N any of various small freshwater cyprinodont fishes of the genera Amblyopsis, Chologaster, etc, living in subterranean and other waters in S North America 洞穴鱼; 一种穴居水窟中的小软鳍鱼科淡水鱼 → see also blindfish
For instance, cave fish lose their eyes, while parasites like tapeworms lose their guts.
举例来说，洞穴鱼失去了眼睛，而像绦虫一样的寄生虫则失去内脏。
The cave fish, on the other hand, remain on high alert, patrolling their habitats even after hours.
而另一方面，穴居鱼仍然保持高度警惕，三更半夜还在居住的地方游来游去。
Because the cave fish may not need less sleep-they may need to stay awake to forage more in an environment where food can be scarce and appear unpredictably.
因为穴居鱼可能并不需要睡得更少——它们可能需要保持清醒，以便更经常地在食物短缺和食物不常出现的环境中觅食。
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