The bulldog goodeid (''Alloophorus robustus'') is a species of goodeid. It is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to stagnant and slow-flowing waters in the Lerma– Chapala, Presa de San Juanico and Balsas basins in west-central and southwestern

Mexico Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...

. Despite its relatively wide range, it is generally uncommon. This is possibly the most predatory goodeid, it feeding on other fish,

crayfish Crayfish are freshwater crustaceans belonging to the infraorder Astacidea, which also contains lobsters. Taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea. They breathe through feather-like gills. Some spe ...

, insects and other invertebrates. At up to at least in

standard length Fish measurement is the measuring of individual fish and various parts of fish anatomy, their anatomies, for data used in many areas of ichthyology, including Taxonomy (biology), taxonomy and fishery biology. Overall length Standard length (SL) is ...

, this is likely the second-largest goodeid, after '' Goodea atripinnis''.

References

Goodeinae Freshwater fish of Mexico Endemic fish of Mexico Monotypic freshwater fish genera {{Cyprinodontiformes-stub