Oceania blumenbachii – synonym of Rathkea octopunctata
Oceania dinema – synonym of Amphinema dinema
Oceania multicirrata – synonym of Staurophora mertensii
Oceania octocostata – synonym of Melicertum octocostatum
Oceania pileata – synonym of Leuckartiara octona
Oceania polycirrha – synonym of Turritopsis nutricula
Oceania turrita – synonym of Leuckartiara octona
Oceania viridula – synonym of Eirene viridula
Octopus aldrovandiÊ – synonym of Eledone cirrhosa
Octopus cirrhosusÊ – synonym of Eledone cirrhosa
Octopus rugosusÊ – synonym of Octopus vulgaris
Octopus vulgaris – synonym of Loligo vulgaris
Octorchandra gertmanica – synonym of Eutima gegenbauri
Octorchis gegenbauri – synonym of Eutima gegenbauri
Octorchis orientalis – synonym of Eutima gegenbauri
Oekopleura dioica – synonym of Oikopleura dioica
Oekopleura fusiformis – synonym of Oikopleura fusiformis
Oikopleura (Coecaria) fusiformis – synonym of Oikopleura fusiformis
Oikopleura (Vexillaria) dioica – synonym of Oikopleura dioica
Oikopleura (Vexillaria) labradoriensis – synonym of Oikopleura labradoriensis
Oikopleura (Vexillaria) parva – synonym of Oikopleura parva
Oikopleura chamissonis – synonym of Oikopleura labradoriensis
Oikopleura flabellum – synonym of Oikopleura dioica
Oikopleura malmy – synonym of Oikopleura dioica
Oikopleura najadis – synonym of Oikopleura parva
Oikopleura rufescens – synonym of Oikopleura vanhoeffeni
Ommastostrephes pteropus – synonym of Stenoteuthis pteropus
Ommastrephes caroliÊ – synonym of Ommastrephes bartramii
Ommastrephes pteropusÊ – synonym of Stenoteuthis pteropus
Ommastrephes sagittatusÊ – synonym of Todarodes sagittatus
Ommatostrephes sagittatusÊ – synonym of Todarodes sagittatus
Oniscus balticus – synonym of Idotea balthica
Oniscus chelipes – synonym of Idotea chelipes
Oniscus coeruleatus – synonym of Gnathia maxillaris
Oniscus linearis – synonym of Idotea linearis
Oniscus viridis – synonym of Idotea chelipes
Onychoteuthis bergii – synonym of Onychoteuthis banksii
Orphania tenuimana – synonym of Parapasiphae sulcatifrons
Ozaena cirrhosaÊ – synonym of Eledone cirrhosa