noun
snake mackerel
A deep-sea fish, Gempylus serpens, known in English as the snake mackerel. The Japanese name is usually written in katakana.
クロタチカマスは深海魚の一種です。
The snake mackerel is a type of deep-sea fish.
The name combines 黒 (kuro, 'black'), 太刀 (tachi, 'long sword'), and 魳/梭子魚/梭魚/魣 (kamasu, 'barracuda'), likely referring to its dark, elongated, barracuda-like body. The exact derivation is uncertain.