Amistad gambusia

The Amistad gambusia (Gambusia amistadensis) is an extinct species of gambusia. They became extinct because their habitat was submerged to a depth of about 70 feet. Two captive populations failed through hybridization with the mosquitofish and predation. It is now extinct.

References

1. NatureServe (2013). "Gambusia amistadensis". IUCN Red List of Threatened Species. 2013: e.T8888A18229604. doi:10.2305/IUCN.UK.2013-1.RLTS.T8888A18229604.en. Retrieved 20 November 2021.
2. Noecker, Robert J. "Endangered Species List Revisions: A Summary of Delisting and Downlisting. - Amistad Gambusia -" (PDF). CRS Report for Congress.