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23 February, 20:58

Difference between hydra, sponge and obelia

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  1. 23 February, 23:44
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    Hydra are simple freshwater animals, while Obelia lives in the sea or fresh water

    Explanation:

    The main difference is that Hydra's body shape is a polyp, while Obelia consist of polyps and medusae in its life cycle
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