Phylum: Cnidaria - Class: Hydrozoa

Order: Leptothecata

Family: Aequoreidae Eschscholtz, 1829

   
Aequorea forskalea Péron & Lesueur, 1810    
Family: Sertularellidae Maronna et al., 2016
   
   

Order: Anthoathecata

Family: Cladonematidae Gegenbaur, 1857

Family: Corymorphidae Allman, 1872
   
Corymorpha nutans M. Sars, 1835    
Family: Porpitidae Goldfuss, 1818
   
Porpita porpita (Linnaeus, 1758)    

Order: Limnomedusae

Family: Olindiidae Haeckel, 1879

   
Olindias muelleri Haeckel, 1879    

Order: Siphonophorae

Family: Apolemiidae Huxley, 1859

   
   
Family: Hippopodiidae Kölliker, 1853
   

Hydrozoa not determined