Cnidaria:Jellyfish

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Cnidaria:Jellyfish

  1. 1. Cnidaria:Jellyfish<br />Angela Floreza and Anyang<br />
  2. 2. Taxonomy<br />
  3. 3. Taxonomy cont.<br />
  4. 4. Habitat and Distribution<br />In the Earth’s oceans and seas, there are over 2000 types of jellyfish!<br />Some live in the cold (but not freezing) parts of the artic<br />And most of them live in the warmer waters.<br />
  5. 5. Structure<br />You can see that most jellyfish have radial symmetry. It can have a plane that can rotate on the body. <br />
  6. 6. Locomotion<br />These creatures are able to swim WITHOUT a heart or a brain.<br />Jellyfish can move themselves by a pulsing their body with a stimulus.<br />
  7. 7. Digestive System<br />These creatures are carnivores, They have to hunt to get their food.<br />The sting their victims, injecting them with venom…<br />Their prey consist of fish and other jellies.<br />The catch their prey with their movement<br />With every expansion, They draw in their small prey.<br />When they contract they push their prey to their tentacles.<br />
  8. 8. Nervous System<br />it characterized by a series of interconnected nerve cells (a nerve net). <br />The nerve net conducts impulses around the entire body of the jellyfish. <br />The strength of a behavioral response is proportional to the stimulus strength. <br /><ul><li>Nervous system work when jellyfish receptors for</li></ul>1. Light 2. touch 3. balance. 4. chemical detection<br />
  9. 9. Reproduction<br />The eggs and sperms developed inside the body wall called “ Gonads”<br />After eggs are fully developed then release into stomach then through the mouth into the sea. <br />In most case, male jellyfish releases his sperms into the surrounding water. then the sperms swims into female jellyfish’s mouth—the fertilization occur. <br />
  10. 10. Reproduction<br />The egg is released into the water and it becomes a larvae.<br />The larvae attaches itself to a base and it becomes a polyp which looks like an anemone) <br />It develops more and it will create and release the baby jellyfish<br />One larvae can produce +5 jellyfish <br />
  11. 11. Reproduction<br />

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