noun
merman; fish-man; half man-half fish
Refers to a mythical or fictional creature that is half human and half fish, typically male. The female counterpart is often 人魚 (にんぎょ, mermaid).
その映画には恐ろしい半魚人が登場する。
A terrifying fish-man appears in that movie.
半魚人の伝説は世界中にある。
Legends of mermen exist all over the world.