clingfish (Aspasma minima)
A small marine fish that clings to rocks; the Japanese name refers to a specific species.
ウバウオは岩に吸い付く小さな魚だ。
The clingfish is a small fish that sticks to rocks.
The name ウバウオ (姥魚) literally means 'old woman fish', but the exact origin is uncertain.