noun
titan triggerfish; giant triggerfish; moustache triggerfish
A large triggerfish species (Balistoides viridescens) found in tropical Indo-Pacific waters. The name ゴマモンガラ refers to its sesame-seed-like spots and triggerfish body shape.
ダイビング中に大きなゴマモンガラを見た。
I saw a large titan triggerfish while diving.
ゴマモンガラは気が強いことで知られている。
Titan triggerfish are known for their aggressive temperament.
モンガラカワハギ is the general term for triggerfish (family Balistidae), while ゴマモンガラ specifically refers to the titan triggerfish (Balistoides viridescens).
The name combines ゴマ (sesame) referring to the dark spots on the body, and モンガラ, a shortened form of モンガラカワハギ (triggerfish). The derivation is descriptive of its appearance.