noun
mottled spinefoot; dusky rabbitfish; sandy spinefoot
A species of rabbitfish (Siganus fuscescens) found in coastal waters of the western Pacific. The name is usually written in katakana.
アイゴは磯釣りでよく見かける魚だ。
The mottled spinefoot is a fish often seen in shore fishing.
アイゴの背びれには毒があるので注意が必要だ。
Be careful because the mottled spinefoot has venomous dorsal spines.
The origin of the name is uncertain. The kanji 藍子 literally means 'indigo child', possibly referring to the fish's coloration, but the exact derivation is unclear.