Cnidarians Jellyfish, corals, hydra and anemone Defining Characteristics Radial Symmetry Tentacles with nematocysts (stinging cells) No cephalization (no head) Two stages: polyp and medusa Endoderm and ectoderm Radial Symmetry
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Jellyfish, corals, hydra and anemone
Like a radial tire, can be dissected along any plane into equal mirror images.
Made of a colony of polyps, each specialized for a single task. One polyp forms the gas-filled float, while others are responsible for feeding or reproduction.
The bright coral colors come from zooxanthallae
The greenish color of this color is due to the zooxanthellae which live inside of it.Zooxanthellae and Coral
Clownfish are immune to the anemone toxins, and can live safely within the tentacles, protected from predators. The anemone isn’t helped or hurt by the clownfish.