So what do they do?They shut the glottis to close off the breathing tube, while sharply inspiring.In essence, they breathe with their gills using an extended form of hiccup.

• 当牠们大力吸气时，会关闭呼吸管的开口（声门），所以蝌蚪用鳃呼吸时，便处于一种近似打长嗝的状态中。