All Fish

Xenurolebias pataxo

Not Evaluated freshwater

Xingu corydoras

Corydoras xinguensis

Not Evaluated freshwater

Xingu-Kaktuswels

Pseudacanthicus leopardus

Not Evaluated freshwater

Xiphophorus mayae

Not Evaluated freshwater

Xiphophorus roseni

Not Evaluated freshwater

Xiurenbagrus dorsalis

Not Evaluated freshwater

Xiurenbagrus gigas

Not Evaluated freshwater

Xyliphius anachoretes

Not Evaluated freshwater

Xyliphius kryptos

Not Evaluated freshwater

Xyliphius sofiae

Not Evaluated freshwater

Xyrias chioui

Not Evaluated saltwater

Yaeba-kuma-itachiuo

Monomitopus pallidus

Not Evaluated saltwater

Yaguajal limia

Limia yaguajali

Not Evaluated freshwater

Yahyaoui barbel

Luciobarbus yahyaouii

Not Evaluated freshwater

Yaima-hira-yoshinobori

Rhinogobius yaima

Not Evaluated freshwater

Yaitogenge

Gymnelopsis ocellata

Not Evaluated saltwater

Yajirihige

Coelorinchus lanceolatus

Not Evaluated saltwater

Yakati rainbowfish

Melanotaenia angfa

Not Evaluated freshwater

Yakiinhaze

Chaeturichthys jeoni

Not Evaluated saltwater

Yakut char

Salvelinus jacuticus

Not Evaluated freshwater

Yaldwyn's triplefin

Notoclinops yaldwyni

Not Evaluated saltwater

Yalicar toothcarp

Heterandria attenuata

Not Evaluated freshwater

Yamahime

Snyderina yamanokami

Not Evaluated saltwater

Yamanoue's seabass

Parascombrops yamanouei

Not Evaluated saltwater

Yamato-shima-dojo

Cobitis matsubarae

Not Evaluated freshwater

Yamihaze

Suruga fundicola

Not Evaluated saltwater

Yami-hige

Coelorinchus nox

Not Evaluated saltwater

Yami-kawamuki

Bathyphylax omen

Not Evaluated saltwater

Yanagi-anahaze

Pseudoblennius argenteus

Not Evaluated saltwater

Yanagi-mebaru

Sebastes itinus

Not Evaluated saltwater

Yanaginomai

Sebastes steindachneri

Not Evaluated saltwater

Yangambi butterbarbel

Schilbe yangambianus

Not Evaluated freshwater

Yang's longnose catshark

Apristurus yangi

Not Evaluated saltwater

Yangtse grenadier anchovy

Coilia brachygnathus

Not Evaluated brackish

Yangtze icefish

Neosalanx taihuensis

Not Evaluated freshwater

Yano's cheek-hook goby

Ancistrogobius yanoi

Not Evaluated saltwater