Vaquitas are considered the smallest and most endangered cetacean in the world. Credit: Paula Olson/Wiki Commons

The world’s most endangered marine mammal is a small porpoise called the vaquita — Spanish for little cow. The vaquita has been under threat for years, but now the poaching of a rare fish may be driving the tiny Mexican porpoise to extinction.Scientists estimate that fewer than 100 vaquita porpoise exist today, all of them in the upper Gulf of California. Vaquitas are small porpoises with big eyes and a permanent grin. None have ever survived in captivity. Poachers are killing the vaquita, but they are actually targeting another endangered fish, the totoaba.

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