But poachers’ gillnets also kill the world’s smallest and most endangered marine mammal — the vaquita marina ... a lot of demand in Asia for these species of totoaba,” said Alfonso ...

Countless others have perished, and while the following are not gone for good, according to the World Wildlife Foundation, they are on the endangered species list.

Federal protections could soon be extended to a rare Nevada fish that environmentalists say is “barely clinging to existence" ...

In the ancient Roman mine underneath Carmona, Spain, researchers discovered a new species of isopod named Baeticoniscus ...

WASHINGTON — It may not be surprising that an “aquatic desert” turtle faces long odds in life, but environmentalists and biologists still welcomed this week’s endangered species ...

The vaquita is the most endangered marine mammal. Fewer than 10 individuals are believed to exist, trapped by illegal fishing nets in the Gulf of California. Getty Images ...

Distinguishing closely related animal species can sometimes feel like an exercise in semantics. But there are real ...