錦鯉[nishikigoi] coloured carp
真鯉[magoi] black carp
緋鯉[higoi] red carp
鯉幟[koinobori] carp streamer
鯉口[koiguchi] mouth of a (sword) sheath

養鯉[youri] carp breeding
俎の鯉[manaitanokoi] confronted with a hopeless situation
鯉ヘルペスウイルス[koiherupesuuirusu] koi herpes virus (KHV)
寒鯉[kangoi] koi carp caught during the cold season