Three biologists - Ernst Haeckel in 1894, Robert Whittaker in 1959, and Carl Woese in 1977 - independently classified living organisms into taxonomic groups called kingdoms. Whittaker classified life into five kingdoms: Monera, Protista, Fungi, Plantae, and Animalia. Pisces is one of the characteristics of the Animalia kingdom. Pisces refers to fish, which are aquatic craniate animals that lack limbs with digits and have a tough scaly skin and gills. Modern fish classes include cartilaginous fish like sharks and bony fish.

1. VISHNU
SHESHATHRI
GRADE - 9
Mount litera zee
school

2. Diversity in living organisms
ERNST ROBERT CARL
HACKEL WHITTAKER WOESE
[1894] [1959] [1977]
These 3 biologists has classified animals into
broad catogaries called “KINGDOM’’.

3. ROBERT WHITTAKER
ROBERT CLASSIFIED:
• MONeRA
• PROTISTA
• FUNGI
• PLANTAE
• ANIMALIA PISCES IS ONE OF
CHARACTER OF ANIMALIA

4. PISCES
Pisces In some classifications, a superclass of the Gnathostomata (jawed chordates)
comprising the fishes (compare Tetrapoda). The whole body of a fish is covered with a
tough, usually scaly, skin (see scales), which extends over the eye and contains
pigments and sometimes slime glands.

5. Pisces In some classifications, a superclass of the
Gnathostomata (jawed chordates) comprising the fishes
(compare Tetrapoda). The whole body of a fish is covered
with a tough, usually scaly, skin (see scales), which
extends over the eye and contains pigments and
sometimes slime glands.

6. Pisces In older classifications, a superclass containing the four
classes of fish: the two extant classes Chondrichthyes
(cartilaginous fish, e.g. sharks) and Osteichthyes (bony fish), the
extinct class Placodermi, and also the most primitive of the
vertebrates of the class Cephalaspidomorphi.

7. (cartilaginous fish, e.g. sharks) and Osteichthyes (bony fish), the
extinct class Placodermi, and also the most primitive of the
vertebrates of the class Cephalaspidomorphi.

8. The circulatory system is a single circuit with blood passing
through two sets of capillaries, one at the gills and the other in
the body tissues. Three semicircular canals are present in the
inner ear.
The sense of smell is particularly well developed and pressure
waves are detected by the lateral-line system (see lateral-line
canal).

9. The sense of smell is particularly well developed and pressure
waves are detected by the lateral-line system (see lateral-line
canal). Fossils of fish date back to the Ordovician period, 505–
438 million years ago. There are two classes of modern fish:
Chondrichthyes (cartilaginous fishes) and Osteichthyes (bony
fishes).

10. The first protofish are known from late Cambrian fossils, and the first true fish,
an agnathan, has been recorded from earliest Ordovician sediments. Most modern
classifications omit the term ’Pisces’, regarding it as artificial. See also
GNATHOSTOMATA.

11. the gill-bearing aquatic craniate animals that lack limbs with
digits. They form a sister group to the tunicates, together
forming the olfactores. Included in this definition are the living
hagfish, lampreys, and cartilaginous and bony fish as well as
various extinct related groups.

12. Tetrapods emerged within lobe-finned fishes, so cladistically
they are fish as well. However, traditionally fish are rendered
paraphyletic by excluding the tetrapods (i.e., the amphibians,
reptiles, birds and mammals which all descended from within
the same ancestry).

13. Because in this manner the term "fish" is defined negatively as a
paraphyletic group, it is not considered a formal taxonomic
grouping in systematic biology. The traditional term pisces
(also ichthyes) is considered a typological, but not a
phylogenetic classification.

14. The earliest organisms that can be classified as fish were soft-
bodied chordates that first appeared during the Cambrian
period. Although they lacked a true spine, they possessed
notochords which allowed them to be more agile than their
invertebrate counterparts.

15. Fish would continue to evolve through the Paleozoic era,
diversifying into a wide variety of forms. Many fish of the
Paleozoic developed external armor that protected them from
predators.

16. The first fish with jaws appeared in the Silurian period,
after which many (such as sharks) became formidable
marine predators rather than just the prey of arthropods.

17. Most fish are ectothermic ("cold-blooded"), allowing their body
temperatures to vary as ambient temperatures change, though
some of the large active swimmers like white shark and tuna can
hold a higher core temperature. Fish are abundant in most bodies
of water.

18. They can be found in nearly all aquatic environments, from high
mountain streams (e.g., char and gudgeon) to the abyssal and even
hadal depths of the deepest oceans (e.g., gulpers and anglerfish). With
33,600 described species, fish exhibit greater species diversity than any
other group of vertebrates.

19. GROUP OF PISCES
SALOMAN SPECIES