rainbow trout
Common freshwater fish, often farmed and used in cuisine.
I go fishing for rainbow trout.
この川にはニジマスが放流されている。
Rainbow trout have been released into this river.
Katakana spelling is standard for this fish name.
Hiragana spelling is also seen, but katakana is more common.
Kanji spelling is uncommon; the word is usually written in kana.
Compound of 虹 (niji, 'rainbow') and 鱒 (masu, 'trout'), referring to the fish's iridescent coloration. The exact historical derivation is uncertain.