Eukaryota  >  Metazoa  >  Cnidaria  >  Hydrozoa

Family	Genus	Species
Abylidae	4	8
Aeginidae	7	17
Aequoreidae	4	59
Agalmatidae	9	27
Aglaopheniidae	9	103
Apolemiidae	1	15
Asyncorinidae	1	1
Athorybiidae	1	3
Balellidae	1	1
Blackfordiidae	1	3
Boreohydridae	1	1
Bougainvilliidae	10	79
Bythotiaridae	4	7
Campanulariidae	15	47
Campanulinidae	5	7
Candelabridae	2	8
Cirrholoveniidae	1	1
Cladocorynidae	2	4
Cladonematidae	3	22
Clathrozoellidae	1	1
Clathrozoidae	1	1
Clausophyidae	5	8
Clavidae	1	5
Clytiidae	1	36
Cordylophoridae	1	18
Corymorphidae	5	29
Corynidae	6	44
Cuninidae	3	24
Cytaeididae	2	21
Diphyidae	7	41
Dipleurosomatidae	2	2
Eirenidae	6	32
Erennidae	1	9
Eudendriidae	2	29
Eutimidae	1	3
Forskaliidae	1	7
Geryoniidae	2	4
Halammohydridae	1	36
Haleciidae	4	60
Halicreatidae	5	10
Halimedusidae	2	3
Halopterididae	4	43
Hebellidae	4	14
Hippopodiiae	0	1
Hippopodiidae	2	7
Hydractiniidae	11	73
Hydrichthyidae	1	1
Hydridae	1	33
Hydrocorynidae	1	2
Kirchenpaueriidae	2	11
Lafoeidae	7	46
Laodiceidae	6	20
Lovenellidae	0	1
Magapiidae	1	1
Malagazziidae	2	8
Margelopsidae	1	2
Melicertidae	1	2
Microhydrulidae	1	0
Milleporidae	1	51
Mitrocomidae	6	12
Moerisiidae	2	7
Monobrachiidae	1	3
Obeliidae	2	36
Oceaniidae	5	46
Olindiasidae	1	1
Olindiidae	9	216
Orchistomatidae	1	3
Otohydridae	1	1
Pandeidae	11	47
Pennariidae	1	4
Phialellidae	1	1
Physaliidae	1	5
Physophoridae	1	4
Plumaleciidae	1	1
Plumulariidae	10	75
Polyorchidae	3	4
Porpitidae	2	5
Prayidae	12	32
Proboscidactylidae	2	8
Protohydridae	1	1
Pseudaeginidae	1	1
Ptilocodiidae	2	4
Ptychogastriidae	3	8
Pyrostephidae	2	7
Rathkeidae	2	4
Resomiidae	1	3
Rhizophysidae	2	3
Rhodaliidae	4	5
Rhopalonematidae	13	33
Rhysiidae	1	1
Sertularellidae	0	1
Sertulariidae	27	127
Similiclavidae	1	1
Solmarisidae	2	11
Solmundaeginidae	1	1
Sphaerocorynidae	4	13
Sphaeronectidae	1	4
Stylasteridae	22	114
Sugiuridae	1	1
Sympagohydridae	1	1
Symplectoscyphidae	1	1
Syntheciidae	2	11
Tetraplatiidae	1	3
Tiarannidae	3	4
Tiaropsidae	2	4
Tubiclavoididae	1	1
Tubulariidae	5	28
Zancleidae	3	483
Zancleopsidae	1	8