All Fish

Orthochromis rubrolabialis

Not Evaluated freshwater

Orthochromis rugufuensis

Not Evaluated freshwater

Orthochromis stormsi

Not Evaluated freshwater

Orthochromis uvinzae

Not Evaluated freshwater

Oryzias bonneorum

Not Evaluated freshwater

Oryzias hadiatyae

Not Evaluated freshwater

Oryzias melastigma

Not Evaluated brackish

Oryzias soerotoi

Not Evaluated freshwater

Oryzias songkhramensis

Not Evaluated freshwater

Oryzias timorensis

Not Evaluated freshwater

Oryzias woworae

Not Evaluated freshwater

Ôsaga

Sebastes iracundus

Not Evaluated saltwater

Oscar

Astronotus ocellatus

Least Concern freshwater

Ô-shachiburi

Ijimaia dofleini

Not Evaluated saltwater

Oshare-chigodara

Physiculus yoshidae

Not Evaluated saltwater

Oshima-okikajika

Artediellus neyelovi

Not Evaluated saltwater

Ôshiro-anago

Ariosoma majus

Not Evaluated saltwater

Ô-soko-itachiuo

Cataetyx platyrhynchus

Not Evaluated saltwater

Osopsaron karlik

Not Evaluated saltwater

Ossancora asterophysa

Not Evaluated freshwater

Ostenfeld's lanternfish

Diaphus ostenfeldi

Not Evaluated saltwater

Osteochilus bleekeri

Not Evaluated freshwater

Osteochilus flavicauda

Not Evaluated freshwater

Osteochilus jeruk

Not Evaluated freshwater

Osteochilus kerinciensis

Not Evaluated freshwater

Osteochilus scapularis

Not Evaluated freshwater

Osteochilus serokan

Not Evaluated freshwater

Osteochilus striatus

Not Evaluated freshwater

Osteochilus vittatoides

Not Evaluated freshwater

Osteodiscus rhepostomias

Not Evaluated saltwater

Ostorhinchus aphanes

Not Evaluated saltwater

Ostorhinchus aroubiensis

Not Evaluated saltwater

Ostorhinchus aterrimus

Not Evaluated saltwater

Ostorhinchus brevispinis

Not Evaluated saltwater

Ostorhinchus chalcius

Not Evaluated saltwater

Ostorhinchus cyanotaenia

Not Evaluated saltwater