SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Scyphozoa
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Staurozoa
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Cubozoa
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Hydrozoa
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Detailed explanation-1: -freshwater jellyfish, any medusa, or free-swimming form, of the genus Craspedacusta, class Hydrozoa (phylum Cnidaria).
Detailed explanation-2: -Most hydrozoans are marine, but hydrozoans also include the few cnidarians that have adapted to fresh water: these are the polyps in the genus Hydra and a few species of small freshwater jellyfish.
Detailed explanation-3: -The Hydrozoa are mostly marine predators that constitute a class in the Cnidaria, to which the corals and jellyfish also belong. Hydroids are a polyp life stage of most hydrozoans, which may be colonial.
Detailed explanation-4: -Freshwater cnidarians inhabit nearly all types of freshwater on all continents (except Antarctica), but only a few species have cosmopolitan distributions.