真ま鯉ごい

noun

black carp; black koi

Refers to the wild-type common carp (Cyprinus carpio) with dark coloration, as opposed to ornamental koi varieties. Used in contexts of fishing, aquaculture, and biology.

• この川かわでは真ま鯉ごいがよく釣つれる。

  Black carp are often caught in this river.

• 真ま鯉ごいは錦にしき鯉ごいの原げん種しゅとされている。

  The black carp is considered the original species of the ornamental koi.