Category:en:Hydrozoans

English terms for types or instances of bluebottles, calycophorans, filiferans, hydras, hydractinians, leptothecates, narcomedusas, pandeids, physonects, plumularians, Portuguese man-of-wars, siphonophores, stylasters, sea firs, sea ginger, trachylids, trachymedusas, amd other animals in the cnidarian class Hydrozoa.

NOTE: This is a set category. It should contain terms for hydrozoans, not merely terms related to hydrozoans. It may contain more general terms (e.g. types of hydrozoans) or more specific terms (e.g. names of specific hydrozoans), although there may be related categories specifically for these types of terms.