The vaquita is Mexico’s only endemic marine mammal.  The name vaquita is Spanish for 

Thevaquita is Mexico’s only endemic marine mammal.  The name vaquita is Spanish for “little cow”, and other names for the species include cochito (Spanish for “little pig”), desert porpoise, vaquita porpoise, Gulf of California harbor porpoise, Gulf of California porpoise, and gulf porpoise.