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Cnidarians Jellies, Anemones, Corals Jellies, Anemones, Corals Dimorphism: Two body shapes during life cycle. (Polyp & Medusa) Dimorphism: Two body shapes.

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Presentation on theme: "Cnidarians Jellies, Anemones, Corals Jellies, Anemones, Corals Dimorphism: Two body shapes during life cycle. (Polyp & Medusa) Dimorphism: Two body shapes."— Presentation transcript:

1 Cnidarians Jellies, Anemones, Corals Jellies, Anemones, Corals Dimorphism: Two body shapes during life cycle. (Polyp & Medusa) Dimorphism: Two body shapes during life cycle. (Polyp & Medusa) Gastrovascular cavity Gastrovascular cavity Primitive nerve net Primitive nerve net Two distinct tissue layers: Epidermis & Gastrodermis Two distinct tissue layers: Epidermis & Gastrodermis Cnidocyte (Stinging cells) Cnidocyte (Stinging cells) Radial Symmetry Radial Symmetry

2 Life cycle Reproduction : Reproduction : Most cnidarians reproduce both sexually and asexually. Most cnidarians reproduce both sexually and asexually.

3 Classes of Cnidaria Scyphozoa (Cup Animals) Scyphozoa (Cup Animals) Hydrozoa (Serpent Animals) Hydrozoa (Serpent Animals) Anthozoa (Flower Animals) Anthozoa (Flower Animals)

4 Scyphozoa Scyphozoa Scyphozoa True jellies True jellies Medusa form during most of its life cycle. Medusa form during most of its life cycle. Lions Mane is the most common in L.I.S. Lions Mane is the most common in L.I.S. Butter fish lives in its tentacles. Butter fish lives in its tentacles.

5 Sea Wasp Sea Wasp Known as box jellyfish Known as box jellyfish Most powerful venom in the world Most powerful venom in the world Lives in Australia Lives in Australia Can be up to 60 meters in length Can be up to 60 meters in length

6 Hydrozoa Both body plans: polyp and medusa Both body plans: polyp and medusa Reproduce sexually as medusas. Reproduce sexually as medusas. Example: Portuguese Man Of War Example: Portuguese Man Of War

7 Anthozoa They are individual or colonies of polyps found in coastal waters. They are individual or colonies of polyps found in coastal waters. No swimming medusa stage. No swimming medusa stage. Examples: Sea anemones,Hard corals, sea fans Examples: Sea anemones,Hard corals, sea fans

8 Sea fans

9 Hard corals

10 Phylum: Ctenophora Ctenophores Ctenophores Common name: Comb jellies Common name: Comb jellies Contain eight rows of comb plates made of cilia used for locomotion. Contain eight rows of comb plates made of cilia used for locomotion. Bioluminescent Bioluminescent No stinging cells No stinging cells They feed on plankton They feed on plankton

11 Comb Jellies

12

13 Candiru Candiru


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