Xiphophorus pygmaeus Hubbs & Gordon, 1943

Conservación: Xiphophorus pygmaeus es evaluada por la Unión Internacional para la Conservación de la Naturaleza en la lista roja de especies amenazadas como (DD) datos deficientes (2018). Although the Huichihuayan and Axtla rivers carry enough flow and most areas remain in very good shape, with some remaining pristine areas, increasing deforestation, pesticides and fertilizers use, and pollution (particularly around Huichihuayan) are common problems that affect them and have to be resolved, particularly given human population increase in the area. During the past years, I have seen an increase in the amount of green algae in the rivers, which was rare before.