Typhleotris mararybe is a critically endangered species of fish in the family Milyeringidae, the blind cave gobies.

[3] It can be distinguished from other members of genus Typhleotris by its dark pigmentation and aspects of its bone structure.

[2] T. mararybe is possibly the sister species of T. madagascariensis, as the two share characteristics in common that T. pauliani, the only other member of the genus, does not.

It was initially known from only a single cave, a karst sinkhole called the Grotte de Vitane near Itampolo, where two specimens were collected,[3] but has later been discovered to occur in four additional sinkholes/caves in the region.

It commemorates an unknown severe illness suffered by members of the field team after their snorkeling expedition to survey the sinkhole.