Eukaryota  >  Metazoa  >  Cnidaria  >  Hydrozoa  >  Anthoathecata

Family	Genus	Species
Asyncorinidae	1	1
Balellidae	1	1
Boreohydridae	1	1
Bougainvilliidae	10	79
Bythotiaridae	4	7
Candelabridae	2	8
Cladocorynidae	2	4
Cladonematidae	3	22
Clathrozoellidae	1	1
Clavidae	1	5
Cordylophoridae	1	18
Corymorphidae	5	29
Corynidae	6	44
Cytaeididae	2	21
Eudendriidae	2	29
Halimedusidae	2	3
Hydractiniidae	11	73
Hydrichthyidae	1	1
Hydridae	1	33
Hydrocorynidae	1	2
Magapiidae	1	1
Margelopsidae	1	2
Milleporidae	1	51
Moerisiidae	2	7
Oceaniidae	5	46
Pandeidae	11	47
Pennariidae	1	4
Polyorchidae	3	4
Porpitidae	2	5
Proboscidactylidae	2	8
Protohydridae	1	1
Ptilocodiidae	2	4
Rathkeidae	2	4
Rhysiidae	1	1
Similiclavidae	1	1
Sphaerocorynidae	4	13
Stylasteridae	22	114
Sympagohydridae	1	1
Tubiclavoididae	1	1
Tubulariidae	5	28
Zancleidae	3	483
Zancleopsidae	1	8