What is the difference between of hydra and starfish
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Hydra is a genus of small, fresh water organisms of the phylum Cnidaria and class Hydrozoa..
STAR FISH:star fish is also known as sea star echinoderms belonging to class Asteroidea..
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Hydra live in freshwater habitats, whereas Obelia is exclusively marine. Hydra does not have medusa form in their life cycle, whereas Obelia has both forms; polyp and medusa. starfish," are not fish.
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