Endangered freshwater fishes of the Yucatan Peninsula

" The Yucatan Peninsula, as a physiographic region, includes the Mexican states of Yucatán, Campeche, and Quintana Roo, as well as the northern half of Belize and the Guatemalan department of Petén. This area harbors a moderate diversity of freshwater fishes, but several of them are endemic species, most of which are endangered, including the species flock of genus Cyprinodon in lake Chichancanab and two cave fishes, Typhlias pearsei and Ophisternon infernale, in addition to Poecilia velifera, Rocio gemmata, and Astyanax altior. The conservation status of these fishes is discussed "