What is "stygichthys"

Stygichthys typhlops, the blind tetra or Brazilian blind characid, is a species of fish in the Characidae family and the only member of the genus Stygichthys. It is endemic to caves in northern Minas Gerais, Brazil. Like other cave-adapted fish (e.g. the cave form of the Mexican tetra), the Brazilian blind characid is blind and lacks pigmentation.

Initially only known from a specimen collected in 1962, it has recently been rediscovered by researchers led by the ichthyologist Dr Cristiano Moreira from the University of São Paulo.