Wiktionary
n. Any of various blind fish, of the family ''(taxlink Amblyopsidae family)'', that inhabit subterranean waters
Wikipedia
Cavefish or cave fish, also known as hypogean fish, is a generic term for freshwater fish adapted to life in caves. Being aquatic, they are a part of the troglobite group known as stygofauna. The approximately 170 species of cavefish are found in all continents, except Antarctica and Europe. Although widespread as a group, many cavefish species have very small ranges and are seriously threatened. Cavefish are members of a wide range of families and do not form a monophyletic group. Typical adaptions found in cavefish are reduced eyes and pigmentation. __TOC__
Usage examples of "cavefish".
At long range, our sensors and communications aren’t so hot, but then again the Cardassians will be blind as Torkan cavefish, too.
But the eagle kills by day and the cavefish swims peacefully in eternal night.