浮うき袋ぶくろ

noun

flotation device; life buoy; swimming float

Refers to any inflatable or buoyant device used to keep a person afloat, such as a life buoy, swimming ring, or water wings. Not limited to a specific shape.

• 子こ供どもは浮うき袋ぶくろをつけてプールで遊あそんでいる。

  The child is playing in the pool wearing a swimming float.

• 船ふねから落おちた人ひとに浮うき袋ぶくろを投なげた。

  They threw a life buoy to the person who fell from the boat.

noun

swim bladder; air bladder

The internal gas-filled organ that helps fish control buoyancy. In everyday contexts, 浮き袋 (うきぶくろ) is used; the technical term 浮嚢 (ふのう) appears mainly in biology.

See also: 鰾 (うきぶくろ)

• 魚さかなの浮うき袋ぶくろは浮ふ力りょくを調ちょう節せつする役やく割わりがある。

  A fish's swim bladder functions to regulate buoyancy.