Noun
English Wikipedia has an article on:cavefishWikipedia
cavefish (plural cavefishes or cavefish)
Any of various fish, typically blind and lacking pigment, that inhabit subterranean waters.
Any fish in the family Amblyopsidae
Cavefish can only be found in caves that have streams running into them; a cave with no inlets does not contain cavefish. Source: Internet
Ozark cavefish tolerate water with extremely low oxygen content. Source: Internet
Three species exhibit efficient metabolism during swimming, as compared with a group of non-cave fish, and many cavefish species exhibit slender bodies adapted to swimming in fast-flowing waters. Source: Internet
Cavefish are probably ancient in origin. Source: Internet
Cavefish protect their eggs for the longest period of any fish. Source: Internet
Life history/behavior Cavefish breed only once a year, occupying about 10% of the population. Source: Internet