| NOUN | animal | hydroid, hydrozoan | colonial coelenterates having the polyp phase dominant |
|---|
| Meaning | colonial coelenterates having the polyp phase dominant. | |
|---|---|---|
| Synonym | hydrozoan | |
| Member of | Hydrozoa, class Hydrozoa | coelenterates typically having alternation of generations |
| Narrower | hydra | small tubular solitary freshwater hydrozoan polyp |
| planula | The flat ciliated free-swimming larva of hydrozoan coelenterates | |
| sertularian | Feathery colony of long-branched stems bearing stalkless paired polyps | |
| siphonophore | A floating or swimming oceanic colony of polyps often transparent or showily colored | |
| Broader | coelenterate, cnidarian | radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures |
| Spanish | hidrozoo | |
| Catalan | hidrozou | |
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