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404 hydrozoans species
Halecium mirabile
Paulinum lineatum
Stauridiosarsia producta
Euphysa japonica
Earleria purpurea
Plotocnide borealis
Stauridiosarsia cliffordi
Coryne japonica
Aglaophenia rhynchocarpa
Macrorhynchia clarkei
Sphaerocoryne agassizii
Maeotias marginata
Protohydra leuckarti
Podocoryna americana
Opercularella lacerata
Eucheilota maculata
Lovenella clausa
Eudendrium racemosum
Lytocarpia nigra
Sertularia robusta
Podocorynoides minima
Lytocarpia phyteuma
Macrorhynchia balei
Crossota norvegica
Pachyrhynchia cuppressina
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