noun
longhorn cowfish
A boxfish with prominent horns above the eyes, found in the Indo-Pacific. The name is a specific biological term; in everyday contexts, it may simply be referred to as a type of ハコフグ.
水族館でコンゴウフグを見た。
I saw a longhorn cowfish at the aquarium.
コンゴウフグは角のような突起が特徴だ。
The longhorn cowfish is characterized by its horn-like projections.
ハコフグ is the general term for boxfish, while コンゴウフグ specifically refers to the longhorn cowfish (Lactoria cornuta).
The name combines 金剛 (kongō, 'vajra' or 'adamantine') with 河豚 (fugu, 'pufferfish'), likely referring to the fish's hard, boxy body and its relation to pufferfish. The exact origin of the name is uncertain.