The vaquita, the world's rarest marine animal, was first discovered in 1958. As few as 30 of these cetaceans (an order of animals that include whales, dolphins, and porpoises) remain in the wild, according to the WWF. This represents a decline of more than 92% since 1997.

Similar to the Philippine crocodile, they also fall prey to entanglement, though, confined to the Gulf of California, climate change might also have a negative impact on their ability to persist as global warming could impact habitat conditions and the food chain.