noun
Asian sheepshead wrasse (Semicossyphus reticulatus)
Refers specifically to the adult male of this fish species. The female is called 寒鯛 (かんだい).
See also: 寒鯛
こぶだいは頭のこぶが特徴的な大きな魚だ。
The Asian sheepshead wrasse is a large fish characterized by the bump on its head.
釣り上げたこぶだいの重さは10キロもあった。
The Asian sheepshead wrasse I caught weighed as much as 10 kilograms.
Refers to the female of the same species, while こぶだい is the adult male.
Compound of こぶ (瘤, 'bump') + だい (鯛, 'sea bream'), referring to the prominent bump on the head of the adult male fish.