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404 hydrozoans species
Aequorea victoria
Velella velella
Mitrocoma cellularia
Polyorchis penicillatus
Proboscidactyla flavicirrata
Eutonina indicans
Clytia gregaria
Aglantha digitale
Stomotoca atra
Muggiaea atlantica
Dynamena pumila
Leuckartiara longicalcar
Neoturris breviconis
Craspedacusta sowerbii
Gonionemus vertens
Ectopleura marina
Nanomia bijuga
Staurostoma mertensii
Obelia geniculata
Melicertum octocostatum
Physalia physalis
Stylantheca papillosa
Catablema vesicarium
Hydra viridissima
Eperetmus typus
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