Endemic to the Sea of Cortez, in the Upper Gulf of California in Mexico, the vaquita is a species of porpoise that has been pushed to the brink of extinction.
The rapid decline of the species is due to illegal fishing. While the vaquita are not the target of illegal fishermen, they are the same size as the highly prized and critically endangered totoaba fish. When a vaquita gets caught in a gillnet, it drowns within minutes as a by-catch.