鰾
う
き
ぶ
く
ろ
Meanings
1
swim bladder; air bladder
The gas-filled organ in fish that controls buoyancy. In everyday contexts, 浮き袋 is the usual term; 鰾 is a specialized or literary kanji.
See also: 浮き袋
The swim bladder of a fish functions to regulate buoyancy.
The swim bladder is an organ unique to fish.