The critically endangered vaquita porpoise, a species endemic to the Sea of Cortez, is at severe risk of extinction due to illegal gillnet fishing for the critically endangered totoaba fish.

Warming ocean waters could reduce the ability of fish, especially large ones, to extract the oxygen they need from their environment.

Conservation efforts in the Atlantic Ocean may be working for one of the most popular - and endangered - species that ends up in the global shark fin trade.