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Sharks are a type of fish with cartilaginous skeletons and streamlined bodies that use gill slits to breathe. They have skin covered in dermal denticles that protect them and improve fluid dynamics, and they have multiple sets of replaceable teeth. Sharks range greatly in size, from the small 17 cm dwarf lanternshark to the massive 12 m whale shark, the largest fish, which feeds by filter feeding on plankton and small fish.
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Sharks
Sharks are a type of fish with cartilaginous skeletons and streamlined bodies that breathe using five to seven gill slits. They have dermal denticles covering their skin for protection and improved hydrodynamics. Sharks range greatly in size, from the dwarf lanternshark of only 17 cm to the whale shark which can grow to 12 meters and feeds by filter feeding plankton and small fish.
Tyler 2
Sharks come in a wide range of sizes, from the smallest at 17 centimeters to the whale shark which can reach 12 meters and feeds mainly on plankton. They have multiple replaceable teeth and their shape helps improve fluid dynamics in water.
Some interesting wildlife records
The document discusses various interesting facts about the fastest, largest, rarest, and other record-holding animals across different species. Some key facts include:
- The fastest animal on land is the cheetah, which can run up to 109 km/hr but only for short distances before exhaustion. The fastest over long distances is the pronghorn antelope.
- The fastest animal in air is the peregrine falcon, which can dive at speeds up to 200 km/hr. The fastest in water is the sailfish, which can reach 100 km/hr despite the greater resistance of water.
- The largest animal is the blue whale, which can grow to over 25 meters and weigh up to
Postmortem of turtle
This document summarizes the findings of a post-mortem examination on a turtle. Key findings include:
- Intestine contained small pebbles and parasites
- Liver, gallbladder and lungs appeared normal
- Stomach contained a live roundworm and serosal hemorrhages
- Kidneys had necrotic foci
- Other organs like the esophagus, trachea, and spleen were also examined
The cause of death was determined to be multi-factorial, including parasitism, choking of the esophagus, and environmental changes as the turtle was a household pet. Recommendations are given to improve husbandry and deworm other turtles.
Reptiles
Reptiles are cold-blooded vertebrates covered in scales that breathe using lungs. Examples include snakes, lizards, turtles, tortoises, alligators and crocodiles. Reptiles lay hard-shelled eggs on land to protect their young from water loss. They differ from amphibians in using lungs rather than gills to breathe throughout their lives.
Fishes
This document summarizes key characteristics of chordates and classes of fish, including jawless and jawed fish. It describes:
1) The five characteristics of chordates and the classes of jawless fish (hagfish and lamprey), which have cartilaginous skeletons and sucker-like mouths.
2) The class Chondrichthyes (sharks and rays), which have cartilage skeletons, dermal placoid scales, and multiple rows of replacement teeth. Reproduction includes live birth and egg-laying.
3) The class Osteichthyes (bony fish), which have over 30,000 species with bony backbones, fins, and swim bladders.
Reptiles
This document discusses the characteristics and classification of reptiles. It begins by introducing duckweed and materials needed for an investigative project. It then covers the defining features of reptiles, including having scales or scutes, being ectothermic, and having three-chambered hearts except in crocodiles. The document proceeds to outline the four orders of reptiles - Crocodilia, Testudines, Squamata, and Rhynchocephalia - providing key details about each order and the types of reptiles that fall within each order.
fishes, Classification of fishes, types of fishes, Study of fishes
Fishes are classified into two main classes: Sarcopterygii and Actinopterygii. Sarcopterygii have lobe-like paired fins while Actinopterygii have ray-like fins. Actinopterygii are further divided into subclasses including Selachii (cartilaginous fishes), Branchyodonti, and Actinopterygii (ray-finned fishes). Ray-finned fishes are then categorized into superorders such as Chondrostei, Holostei, and Teleostei based on characteristics of their scales, fins, mouths and other physical attributes. Numerous examples of characteristic fishes from different orders are provided
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Sharks
Sharks are a type of fish with cartilaginous skeletons and streamlined bodies that breathe using five to seven gill slits. They have dermal denticles covering their skin for protection and improved hydrodynamics. Sharks range greatly in size, from the dwarf lanternshark of only 17 cm to the whale shark which can grow to 12 meters and feeds by filter feeding plankton and small fish.
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Sharks come in a wide range of sizes, from the smallest at 17 centimeters to the whale shark which can reach 12 meters and feeds mainly on plankton. They have multiple replaceable teeth and their shape helps improve fluid dynamics in water.
Some interesting wildlife records
The document discusses various interesting facts about the fastest, largest, rarest, and other record-holding animals across different species. Some key facts include:
- The fastest animal on land is the cheetah, which can run up to 109 km/hr but only for short distances before exhaustion. The fastest over long distances is the pronghorn antelope.
- The fastest animal in air is the peregrine falcon, which can dive at speeds up to 200 km/hr. The fastest in water is the sailfish, which can reach 100 km/hr despite the greater resistance of water.
- The largest animal is the blue whale, which can grow to over 25 meters and weigh up to
Postmortem of turtle
This document summarizes the findings of a post-mortem examination on a turtle. Key findings include:
- Intestine contained small pebbles and parasites
- Liver, gallbladder and lungs appeared normal
- Stomach contained a live roundworm and serosal hemorrhages
- Kidneys had necrotic foci
- Other organs like the esophagus, trachea, and spleen were also examined
The cause of death was determined to be multi-factorial, including parasitism, choking of the esophagus, and environmental changes as the turtle was a household pet. Recommendations are given to improve husbandry and deworm other turtles.
Reptiles
Reptiles are cold-blooded vertebrates covered in scales that breathe using lungs. Examples include snakes, lizards, turtles, tortoises, alligators and crocodiles. Reptiles lay hard-shelled eggs on land to protect their young from water loss. They differ from amphibians in using lungs rather than gills to breathe throughout their lives.
Fishes
This document summarizes key characteristics of chordates and classes of fish, including jawless and jawed fish. It describes:
1) The five characteristics of chordates and the classes of jawless fish (hagfish and lamprey), which have cartilaginous skeletons and sucker-like mouths.
2) The class Chondrichthyes (sharks and rays), which have cartilage skeletons, dermal placoid scales, and multiple rows of replacement teeth. Reproduction includes live birth and egg-laying.
3) The class Osteichthyes (bony fish), which have over 30,000 species with bony backbones, fins, and swim bladders.
Reptiles
This document discusses the characteristics and classification of reptiles. It begins by introducing duckweed and materials needed for an investigative project. It then covers the defining features of reptiles, including having scales or scutes, being ectothermic, and having three-chambered hearts except in crocodiles. The document proceeds to outline the four orders of reptiles - Crocodilia, Testudines, Squamata, and Rhynchocephalia - providing key details about each order and the types of reptiles that fall within each order.
fishes, Classification of fishes, types of fishes, Study of fishes
Fishes are classified into two main classes: Sarcopterygii and Actinopterygii. Sarcopterygii have lobe-like paired fins while Actinopterygii have ray-like fins. Actinopterygii are further divided into subclasses including Selachii (cartilaginous fishes), Branchyodonti, and Actinopterygii (ray-finned fishes). Ray-finned fishes are then categorized into superorders such as Chondrostei, Holostei, and Teleostei based on characteristics of their scales, fins, mouths and other physical attributes. Numerous examples of characteristic fishes from different orders are provided
Connorp finishedp3
Turtles are reptiles with a strong shell that protects their inner organs and backbone. They can live on land or in water, breathing air through a process called buccal pumping. Their shells come in different shapes depending on whether they live on land or in water. While most turtle species lay eggs, some turtle genders are determined by temperature during incubation. The alligator snapping turtle is one of the largest turtle species known for its size, spiked shell, and diet of fish and smaller animals.
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This document provides information about various ocean creatures including whales, sharks, octopuses, jellyfish, and rays. It describes some key facts about each creature such as their physical characteristics, sizes, behaviors, and classifications. It also includes a brief author biography at the end.
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Elephant shrews are small, insectivorous mammals found in Africa. They resemble rodents but have elongated snouts and scaly tails. Their sizes vary from 10-30 cm long and they weigh 50g to over 500g. They are insectivores, using their long noses to find prey like insects and their tongues to flick food into their mouths. Some eat small plants. The short-eared elephant shrew lives in southern Africa and inhabits desert and semi-desert areas, burrowing in sand. They breed in warm seasons, with females having multiple pregnancies. Elephant shrews have economic importance by controlling pest populations and being used for research and education.Liam 2
Sharks are a type of fish with cartilaginous skeletons and streamlined bodies. They have several rows of replaceable teeth and range widely in size. Sharks have keen senses of smell and can detect very small amounts of chemicals in water. While their eyes are similar to other vertebrates, sharks have adaptations that allow them to see well in dark ocean waters. It is unclear exactly how sharks sleep but some evidence suggests they may sleep with half their brain at a time.
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The document discusses four classes of jellyfish: Scyphozoa, Hydrozoa, Cubozoa, and box jellyfish. Scyphozoa are characterized by their bell-shaped bodies and include the largest jellyfish species which can have bells over 13 feet wide. Hydrozoa include hydras and the Portuguese man-of-war, which is actually a colony of polyps despite being commonly called a jellyfish. Cubozoa have cube-shaped bells and include the highly venomous box jellyfish. Lifeguards in areas with box jellyfish protect themselves by wearing two layers of pantyhose, which the jellyfish's stinging cells cannot penetrate.
Reptiles
Reptiles are ectothermic vertebrates with dry, scaly skin covered in scales. They lay amniotic eggs with membranes that protect the embryo and allow for gas exchange. Reptiles first appeared 280 million years ago and dominated during the Mesozoic era. Modern reptiles include turtles, crocodiles and alligators, and lizards and snakes. While most reptiles show no care for their eggs, crocodiles are very maternal and protect their hatchlings.
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This document provides an overview of fish classification systems presented by Nelson in 1984 and updated in 2016. It outlines the major taxonomic groups of fish, including jawless fish (hagfish and lampreys), cartilaginous fish (sharks and rays), and bony fish classified into ray-finned fish and lobe-finned fish. The updated 2016 classification separates hagfish from other fish and divides bony fish into two subclasses based on fin structure.
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Silverfish are small, wingless insects that feed on starches and sugars. They have long antennae and move in a wiggling motion. Silverfish lay eggs in cracks and crevices, and go through many molts during their multi-year lifecycles. Though primarily nocturnal and found worldwide in damp areas, some domestic species can damage household goods by feeding on materials like paper and cloth. Integrated pest management of silverfish involves both physical controls like dehumidification and vacuuming, as well as borate-based chemical treatments.
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This document provides information on ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii). It describes their general characteristics such as habitat, locomotion, nutrition, and reproduction. It also covers their classification and anatomical features. Ray-finned fish make up over 50% of known fish species and contain familiar bony fish. They have flexible fins supported by bones. Lobe-finned fish were more abundant in the past and include lungfish and coelacanths. They have fleshy lobed fins and some can live on land.
Marine mammals
Marine mammals like whales and manatees are fully adapted to life in the ocean. Whales are large, intelligent aquatic mammals that breathe air through blowholes. There are two main types of whales - toothed whales that have teeth and echolocate, and baleen whales that filter feed using baleen plates. Whales migrate long distances annually and live in family pods. Manatees and dugongs are also fully aquatic mammals that eat aquatic plants. There are currently only four remaining species of manatees and dugongs that live in shallow warm coastal waters.
Reptiles Life Science 15 4
Reptiles first appeared nearly 280 million years ago and include turtles, crocodiles, and lizards and snakes. They have dry scaly skin, lay amniotic eggs with membranes to protect embryos, and show little maternal care once eggs are laid. Modern reptiles descended from early reptiles and vary widely in size, shape, color, habitat, diet, and behavior.
Marine Mammals
Marine mammals include cetaceans, sirenians, and carnivores that rely on the ocean for existence. They are warm-blooded, breathe air, bear live young, and nurse with milk. Cetaceans include whales, dolphins, and porpoises that communicate and echolocate. Sirenians such as manatees and dugongs graze on aquatic plants. Carnivores include three families of pinnipeds (seals, sea lions, walrus), polar bears, and two families of otters. Physiological adaptations allow marine mammals to dive, thermoregulate, and locomote in water. Many species face threats and some are endangered.
Agnatha
There are only a few vertebrates that have no jaws, such as lampreys and hagfish. Jaws evolved from gill arches in fish and provided benefits like being able to hold food so it couldn't escape from the stomach. Paired fins also evolved around the same time, and it would have been difficult to swim without front fins. Both lampreys and hagfish are jawless fish, with lampreys having an eel-like body structure and hagfish having eyes beneath their skin and no vertebrae.
Crocodilian Notes
There are 23 species of crocodilians classified into three families: crocodiles, alligators and caimans, and gharials. Crocodiles have long pointed snouts with the fourth lower tooth exposed, while alligators and caimans have broad, rounded snouts with the fourth lower tooth hidden. Gharials have extremely long, thin snouts lined with needle-like teeth adapted for catching fish.
Marine Mammals Long Island
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Amphibians
Amphibians evolved from lobe-finned fishes around 345 million years ago. They can live both on land and in water, using various organs for respiration in different environments. There are over 2,000 living amphibian species classified into four orders: Anura (frogs and toads), Urodela (salamanders), Trachystoma (mud eels), and Apoda (caecilians). Amphibians have key adaptations like permeable skin and an aquatic larval stage that allow them to transition between aquatic and terrestrial habitats.
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The Great Barrier Reef is the largest coral reef system in the world, visible from space. It supports tremendous biodiversity, including clown fish that protect themselves by hiding among sea anemones. A large portion is protected as part of the Great Barrier Reef Marine Park to help preserve the ecosystem, while tourism also provides an economic boost for the region.
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Turtles are reptiles with a strong shell that protects their inner organs and backbone. They can live on land or in water, breathing air through a process called buccal pumping. Their shells come in different shapes depending on whether they live on land or in water. While most turtle species lay eggs, some turtle genders are determined by temperature during incubation. The alligator snapping turtle is one of the largest turtle species known for its size, spiked shell, and diet of fish and smaller animals.
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Elephant shrews are small, insectivorous mammals found in Africa. They resemble rodents but have elongated snouts and scaly tails. Their sizes vary from 10-30 cm long and they weigh 50g to over 500g. They are insectivores, using their long noses to find prey like insects and their tongues to flick food into their mouths. Some eat small plants. The short-eared elephant shrew lives in southern Africa and inhabits desert and semi-desert areas, burrowing in sand. They breed in warm seasons, with females having multiple pregnancies. Elephant shrews have economic importance by controlling pest populations and being used for research and education.Liam 2
Sharks are a type of fish with cartilaginous skeletons and streamlined bodies. They have several rows of replaceable teeth and range widely in size. Sharks have keen senses of smell and can detect very small amounts of chemicals in water. While their eyes are similar to other vertebrates, sharks have adaptations that allow them to see well in dark ocean waters. It is unclear exactly how sharks sleep but some evidence suggests they may sleep with half their brain at a time.
Endangerd marine mammals and sea birds
This presentation is on Endangerd species of marine mammals and marine birds. Explain about bioligy,habitat,reproduction,threats and conservations of the animals.
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The document discusses four classes of jellyfish: Scyphozoa, Hydrozoa, Cubozoa, and box jellyfish. Scyphozoa are characterized by their bell-shaped bodies and include the largest jellyfish species which can have bells over 13 feet wide. Hydrozoa include hydras and the Portuguese man-of-war, which is actually a colony of polyps despite being commonly called a jellyfish. Cubozoa have cube-shaped bells and include the highly venomous box jellyfish. Lifeguards in areas with box jellyfish protect themselves by wearing two layers of pantyhose, which the jellyfish's stinging cells cannot penetrate.
Reptiles
Reptiles are ectothermic vertebrates with dry, scaly skin covered in scales. They lay amniotic eggs with membranes that protect the embryo and allow for gas exchange. Reptiles first appeared 280 million years ago and dominated during the Mesozoic era. Modern reptiles include turtles, crocodiles and alligators, and lizards and snakes. While most reptiles show no care for their eggs, crocodiles are very maternal and protect their hatchlings.
Rotifera,acanthocephala
This presentation discusses rotifers and acanthocephalans. It is presented by 5 students and discusses the body structure, nervous system, feeding, and life cycle of rotifers. Rotifers are microscopic pseudocoelomate animals found in freshwater environments and soil. The presentation then discusses acanthocephalans, which are parasitic worms with a proboscis used to pierce hosts' guts. Their life cycles involve at least two hosts and they have up to 1420 species. It describes their physical and morphological characteristics, digestion, proboscis, size, skin, nervous system, and life cycle.
Fish classification
This document provides an overview of fish classification systems presented by Nelson in 1984 and updated in 2016. It outlines the major taxonomic groups of fish, including jawless fish (hagfish and lampreys), cartilaginous fish (sharks and rays), and bony fish classified into ray-finned fish and lobe-finned fish. The updated 2016 classification separates hagfish from other fish and divides bony fish into two subclasses based on fin structure.
ORDER :- CYPRINIFORMES
This document provides information on taxonomies of commercially important fish belonging to the order Cypriniformes. It begins by describing the order Cypriniformes, which contains over 3000 species of freshwater fish divided among characins, electric eels, and carps. It then lists the main families in this order including Cyprinidae, which is the largest family containing carps and minnows. The document proceeds to provide more detailed information on taxonomy and characteristics of several commercially important species within the family Cyprinidae, including the rohu, catla, common carp, grass carp, and mrigal carp.
Order thysanura (silver fish)
Silverfish are small, wingless insects that feed on starches and sugars. They have long antennae and move in a wiggling motion. Silverfish lay eggs in cracks and crevices, and go through many molts during their multi-year lifecycles. Though primarily nocturnal and found worldwide in damp areas, some domestic species can damage household goods by feeding on materials like paper and cloth. Integrated pest management of silverfish involves both physical controls like dehumidification and vacuuming, as well as borate-based chemical treatments.
Class Actinopterygii and Class Sarcopterygii
This document provides information on ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii). It describes their general characteristics such as habitat, locomotion, nutrition, and reproduction. It also covers their classification and anatomical features. Ray-finned fish make up over 50% of known fish species and contain familiar bony fish. They have flexible fins supported by bones. Lobe-finned fish were more abundant in the past and include lungfish and coelacanths. They have fleshy lobed fins and some can live on land.
Marine mammals
Marine mammals like whales and manatees are fully adapted to life in the ocean. Whales are large, intelligent aquatic mammals that breathe air through blowholes. There are two main types of whales - toothed whales that have teeth and echolocate, and baleen whales that filter feed using baleen plates. Whales migrate long distances annually and live in family pods. Manatees and dugongs are also fully aquatic mammals that eat aquatic plants. There are currently only four remaining species of manatees and dugongs that live in shallow warm coastal waters.
Reptiles Life Science 15 4
Reptiles first appeared nearly 280 million years ago and include turtles, crocodiles, and lizards and snakes. They have dry scaly skin, lay amniotic eggs with membranes to protect embryos, and show little maternal care once eggs are laid. Modern reptiles descended from early reptiles and vary widely in size, shape, color, habitat, diet, and behavior.
Marine Mammals
Marine mammals include cetaceans, sirenians, and carnivores that rely on the ocean for existence. They are warm-blooded, breathe air, bear live young, and nurse with milk. Cetaceans include whales, dolphins, and porpoises that communicate and echolocate. Sirenians such as manatees and dugongs graze on aquatic plants. Carnivores include three families of pinnipeds (seals, sea lions, walrus), polar bears, and two families of otters. Physiological adaptations allow marine mammals to dive, thermoregulate, and locomote in water. Many species face threats and some are endangered.
Agnatha
There are only a few vertebrates that have no jaws, such as lampreys and hagfish. Jaws evolved from gill arches in fish and provided benefits like being able to hold food so it couldn't escape from the stomach. Paired fins also evolved around the same time, and it would have been difficult to swim without front fins. Both lampreys and hagfish are jawless fish, with lampreys having an eel-like body structure and hagfish having eyes beneath their skin and no vertebrae.
Crocodilian Notes
There are 23 species of crocodilians classified into three families: crocodiles, alligators and caimans, and gharials. Crocodiles have long pointed snouts with the fourth lower tooth exposed, while alligators and caimans have broad, rounded snouts with the fourth lower tooth hidden. Gharials have extremely long, thin snouts lined with needle-like teeth adapted for catching fish.
Marine Mammals Long Island
This document summarizes marine mammal classification and adaptations for aquatic life. It describes the three main groups of marine mammals - pinnipeds, sirenians, and cetaceans - and provides examples of species within each group. It also discusses physical and physiological adaptations that allow marine mammals to thrive in the ocean environment, including streamlined bodies, insulation from blubber, and efficient oxygen storage and circulation.
Amphibians
Amphibians evolved from lobe-finned fishes around 345 million years ago. They can live both on land and in water, using various organs for respiration in different environments. There are over 2,000 living amphibian species classified into four orders: Anura (frogs and toads), Urodela (salamanders), Trachystoma (mud eels), and Apoda (caecilians). Amphibians have key adaptations like permeable skin and an aquatic larval stage that allow them to transition between aquatic and terrestrial habitats.
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Order macroscelidea Shared By Abdul Qahar Buneri AWKUM BUner Campus
Order macroscelidea Shared By Abdul Qahar Buneri AWKUM BUner Campus
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Great Barrier Reef
The Great Barrier Reef is the largest coral reef system in the world, visible from space. It supports tremendous biodiversity, including clown fish that protect themselves by hiding among sea anemones. A large portion is protected as part of the Great Barrier Reef Marine Park to help preserve the ecosystem, while tourism also provides an economic boost for the region.
Princinples of Tooth Extraction
This document outlines the principles of uncomplicated tooth extraction. It discusses presurgical assessment including medical status, indications and contraindications for removal. Clinical evaluation involves assessing access, mobility, crown condition and radiographs. Mechanical principles that aid extraction include levers, elevators and forceps. Forceps are used to expand the bony socket, remove the tooth and apply different forces like apical, buccal, lingual and rotational pressure depending on the tooth. The goals are to mobilize and deliver the tooth from the socket in a safe manner.
Exodontia
Extraction of Teeth involves removing teeth from the mouth. There are two main methods - intra-alveolar extraction which uses dental forceps, and trans-alveolar extraction which uses surgical techniques. Proper technique is important to remove the tooth with minimal trauma. Factors like tooth condition, location in the mouth, and related anatomy determine the appropriate tools and extraction method used.
Principles of Exodontia
The document discusses principles of exodontia (tooth extraction). It covers:
1) Preparations for extractions including patient and surgeon positioning.
2) Techniques for extractions including intra-alveolar (using forceps) and trans-alveolar (using surgical flaps).
3) Parts and requirements of dental forceps and how to perform forceps extractions in two movements.
4) Modifications for extracting primary teeth and considerations for the inferior alveolar nerve and resilient bone.
Exodontia
This seminar presentation discusses dental extraction techniques. It begins with definitions of painless tooth extraction and a brief history of dentistry. It then describes different extraction methods and indications for extraction. Factors to consider like medical history, radiographs, equipment and positioning are outlined. The presentation addresses techniques for specific tooth types, emphasizing using the correct instruments and applying forces in ways to safely leverage teeth out of the jawbone with minimal trauma.
Dental anatomy
This document provides an overview of dental anatomy and physiology. It discusses the major structures of teeth, including enamel, dentin, cementum and dental pulp. It describes the primary and secondary dentitions. It also outlines the functions of the oral cavity, including the roles of plaque, saliva, and pH in demineralization and remineralization. The goal is to identify dental structures, discuss their characteristics, and describe the biologic functions that take place in the oral cavity.
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This document provides an overview of exodontia (tooth extraction) principles, techniques, and complications. It begins with definitions of tooth extraction and discusses the history of dental extraction forceps. Different techniques for tooth extraction are described, including the forceps technique, elevator technique, and transalveolar extraction technique involving bone removal. Factors related to patient positioning and anesthesia are outlined. Indications, contraindications, and complications of tooth extraction are summarized. The document concludes with descriptions of various extraction techniques and post-operative care.
Simple tooth extraction technique
This document outlines the basic technique for simple tooth extraction. It describes the proper positioning of the patient and surgeon, use of instruments like desmotomes and extraction forceps to separate the tooth from soft tissues and bone, and the mechanical principles involved like expansion of the bony socket and use of levers. Key steps include using desmotomes to sever soft tissue attachments, selecting the appropriate extraction forceps based on tooth type, applying steady outward and rotational forces to luxate the tooth from its socket, and removing the tooth with a final outward and occlusal movement. Proper technique helps control forces and avoid trauma during extraction.
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Dolphins are marine mammals closely related to whales and porpoises that are found worldwide in shallow seas, mostly eating fish and squid. There are almost forty species of dolphin in seventeen genera ranging greatly in size from the smallest at 1.4 m (4.6 ft) and 40 kg up to the largest, the Orca or Killer Whale, at 9.5 m (30 ft) and 10 tonnes.
Sharks
Sharks are carnivorous fish that have inhabited Earth's oceans for over 400 million years. They come in many different shapes and sizes, ranging from the small dogfish shark only growing a few inches long to the massive whale shark that can reach over 60 feet. Despite being portrayed as man-eating monsters, most shark species are not a threat to humans as they usually avoid areas where people enter the water.
Sharks
Sharks have rows of teeth that are constantly replaced throughout their lives. They can lose up to 30,000 teeth. The rate of replacement varies between species from every 8-10 days to several months. Shark skeletons are made of cartilage rather than bone. Sharks typically hunt alone but will sometimes feed together if attracted to prey. Baby sharks are called pups and can be born through egg laying, live birth, or in between.
Jellyfish
Jellyfish are found in every ocean from the surface to the deep sea. They are sometimes found in large groups called blooms or swarms. Jellyfish do not have a brain.
Starfish
Starfish have five arms. The document provides a brief one sentence description stating that starfish have five arms. In just two sentences, the summary efficiently conveys the key information from the original one sentence document about starfish having five arms.
Stuiring Ray
Stingrays are a family of rays related to sharks that are commonly found in coastal tropical waters worldwide. While most live in marine environments, some species can also be found in fresh water. Stingrays have the ability to jump out of the water.
Sharks
Sharks have many rows of teeth that continuously fall out and are replaced, with sharks losing thousands of teeth per year. The document includes photos of sharks hunting and close-up shots of sharks, as well as a photo of the author.
Dolphin
Dolphins are marine mammals closely related to whales and porpoises. There are almost forty species of dolphins that vary in size and have evolved around ten million years ago during the Miocene. Dolphins are found worldwide mostly in shallow seas, eat fish and squid, and are considered some of the most intelligent animals.
Starfish
Starfish live in oceans around the world. They have a central disc and five arms protruding from their body. Despite not having eyes or brains, starfish are able to move and hunt for food along the ocean floor.
Salt Water Fish
Saltwater fish require saltwater and live in marine environments, while tropical fish kept as aquarium pets come in many bright colors derived from pigments in saltwater fish and iridescence in freshwater varieties. Common saltwater and tropical fish kept in home aquariums include clownfish, angelfish, guppies, and others.
Sharks
Sharks are the author's favorite animal and while they sometimes mistake humans for other animals, sharks are actually a type of fish with a cartilaginous skeleton and streamlined body.
Starfish
Starfish have the remarkable ability to regenerate lost limbs. They are echinoderms in the class Asteroidea. While the names "sea star" and "starfish" are sometimes used differently, with "starfish" referring more broadly to related animals like brittle stars, most starfish have five arms, though some have more.
Sea Horses
There are over 47 species of seahorses found in shallow tropical and temperate waters worldwide, ranging in size from very small dwarf seahorses to those over a foot long off Central America. Seahorses have a pouch like a kangaroo where males carry and protect the eggs until birth.
Dolphins
Dolphins are mammals that live in the ocean. They are marine mammals closely related to whales and porpoises. Dolphins are able to live in the ocean due to their streamlined bodies and ability to hold their breath underwater for long periods of time.
Dolphins
Dolphins are marine mammals that are closely related to whales and porpoises. They are considered cool animals that live in water environments.
Killer Whale
Killer whales are large, social marine mammals that can eat up to 12,000 pounds of food per day. They hunt a variety of prey including fish, sharks, seals, sea lions, walruses and even other whales. Killer whale mothers spend time caring for and bonding with their babies.
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Antony 2
- 1. sharks By Antony
- 4. Sharks eat fish.
- 5. Sharks (superorderSelachimorpha) are a type of fish with a full cartilaginousskeleton and a highly streamlined body. They respire with the use of five to seven gill slits. Sharks have a covering of dermal denticles that protect their skin from damage and parasites and improve fluid dynamics. They have several sets of replaceable teeth.[1] Sharks range in size from the small dwarf lanternshark, Etmopterusperryi, a deep sea species of only 17 centimetres (7 in) in length, to the whale shark, Rhincodontypus, the largest fish, which grows to a length of approximately 12 metres (39 ft) and which feeds only on plankton, squid, and small fish through filter feeding.