Olgibia pearsei
(Quote from Subterranean Fishes of the World, Graham S. Proudlove, page 177)
Habitat
Olgibia pearsei is the top predator in the Mayan Blue Cenote system and probably fulfils the same position in other locations (Pohlmann, Iliffe and Cifuentes, 1997; Pohlmann, Iliffe and Cifuentes, 2000). At least four species of troglobitic shrimps, Typhlatya mitchelli, T. campecheae, T. pearsei (Crustacea, Decapoda, Atyidae) and Creaseria morleyi (Crustacea, Decapoda,Palaemonidae) inhabit the subterranean waters of Yucatan (Hobbs and Hobbs, 1976; Holthuis, 1977) and these may form part of the food supply of the cave fishes. Reddell (1981) records other aquatic fauna from this area.