Profundulus hildebrandi Miller, 1950[3] The Popoyote (Tlaloc hildebrandi), also known as the Chiapas killifish,[4] is a killifish from the family Profundulidae which is endemic to the valley of San Cristobal de las Casas in the Chiapas Highlands in Southern Mexico.

It is highly endangered because its natural habitat, which amounts to only a few square kilometers, is subject to contamination and urban sprawl from San Cristobal.

[5] Tlaloc hildebrandi was described in 1950 by Robert Rush Miller with the type locality given as the closed basin of San Cristóbal de las Casas in the Atlantic drainage of Chiapas at an elevation of 2,200 metres (7,200 ft).

[7] The popoyote uses the channels and puddles that remain after the rains to lay as many as 150 eggs per female, which hatch after three days.

Their diet largely consists of the larvae and adults of mosquitoes,[5] although they will also feed on molluscs as well as other insects, such as beetles and dragonflies.