The Cyprinodon riverendi lives in the benthopelagic, non-migratory, freshwater environment.
Cyprinodon riverendi → Cyprinodon variegatus riverendi Cyprinodon rubrofluviatilis Fowler, 1916 (Lazara (1984):64, Sterba (1990):544, Baensch & Riehl (1995):436, Wildekamp (1995):341, Schleser (1998):120, Seegers (2000):45) "Red River pupfish" Cyprinodon salinus milleri LaBounty & More