在他们蓝色球根状的头前面有一个弧形状的牙，那个就是颌骨。
At the front of their bulbous blue heads they have curved fangs that act as jaws.
当感到遇到威胁的时候，海鳃立刻放出绿光，并向球根状的足部充气。
When disturbed, sea pens emit a greenish light and can deflate, retreating into their bulbous feet.
青蛙实际上把球根状的眼球送进口腔，并利用他们的眼球把昆虫送到喉咙里。
Frogs actually take their bulbous eyeballs and bring them down into their mouth cavity and use their eyeballs to shove the insect down the throat.
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