鱼用鳍来平衡和驱动身体。
他继续游到了爪哇海，见到了能跃出水面的鱼，生活在海底的鱼，可以用鳍走路的鱼。
On he swam into the Java sea. And he saw fish that leapt out of the water and fish that lived on the bottom of the sea and fish that could walk on their 15 fins.
就是模仿这一点，Gymnobot用较低的，刀子一样的“鳍”在水中推动自己，而身体同样保持僵硬状态。
In the same way, Gymnobot USES its lower, bladelike "fin" to propel itself through the water while the body remains rigid.
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