Indeed, the world's 37 species of seahorse are fish, breathing through gills and using a swim bladder to control their buoyancy.

事实上，世界上有37种海马是鱼，它们通过鳃呼吸，用鱼鳔来控制浮力。

Soak the dry swim bladder in hot water.

用热水将花胶浸泡。

The pressure in the swim bladder is regulated by a gas gland.

鱼鳔中的压力由一个气体腺来管控。

The inflation of swim bladder can be influenced by nutritional and environmental factors mainly.

在人工养殖条件下，影响海洋闭鳔鱼类鳔器官充气的因子有营养因子和环境因子。

The scientists studied how the fish used muscles to vibrate their swim bladder, creating the sounds.

科学家们还研究了食人鱼是怎样使用肌肉来震动它们的鱼鳔从而发出声音的。