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Cnidarians Jellies, Anemones, Corals
Dimorphism: Two body shapes during life cycle. (Polyp & Medusa) Gastrovascular cavity Primitive nerve net Two distinct tissue layers: Epidermis & Gastrodermis Cnidocyte (Stinging cells) Radial Symmetry
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Life cycle Reproduction :
Most cnidarians reproduce both sexually and asexually.
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Classes of Cnidaria Scyphozoa (Cup Animals) Hydrozoa (Serpent Animals)
Anthozoa (Flower Animals)
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Scyphozoa Scyphozoa True jellies
Medusa form during most of its life cycle. Lions Mane is the most common in L.I.S. Butter fish lives in its tentacles.
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Sea Wasp Known as box jellyfish Most powerful venom in the world
Lives in Australia Can be up to 60 meters in length
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Hydrozoa Both body plans: polyp and medusa
Reproduce sexually as medusas. Example: Portuguese Man Of War
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Anthozoa They are individual or colonies of polyps found in coastal waters. No swimming medusa stage. Examples: Sea anemones,Hard corals, sea fans
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Sea fans
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Hard corals
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Phylum: Ctenophora Ctenophores Common name: Comb jellies
Contain eight rows of comb plates made of cilia used for locomotion. Bioluminescent No stinging cells They feed on plankton
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Comb Jellies
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Candiru
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