似鯉

にごい ニゴイ

Hemibarbus barbus (species of cyprinid)

養鯉

ようり ようこい

carp breeding

鯉口

こいぐち

mouth of a (sword) sheath

錦鯉

にしきごい

coloured carp, colored carp

緋鯉

ひごい

red carp, golden carp

寒鯉

かんごい

koi carp caught during the cold season

真鯉

まごい

black carp, black koi

鯉ヘルペスウイルス

こいヘルペスウイルス

koi herpes virus (KHV)

伊勢鯉

いせごい イセゴイ

striped mullet (Mugil cephalus)

銀湯鯉

ぎんゆごい

barred flagtail (Kuhlia mugil); five-bar flagtail

鯉のぼり

こいのぼり

carp streamer, carp banner

俎板の鯉

まないたのこい

confronted with a hopeless situation, about to be cut off (e.g. in a battle) and unable to do anything

まな板の鯉

まないたのこい

someone doomed to their fate; fish on the chopping board

鯉口を切る

こいぐちをきる

to loosen one's sword slightly in the scabbard

まな板の上の鯉

まないたのうえのこい

someone doomed to their fate; fish on the chopping board