A fish previously declared extinct has been released back into the wild in Australia. The olive perchlet, a small oval-shaped fish with large eyes, was considered extinct in Victoria, Australia, in ...

These "total monsters of fishes" are extinct today, though new clues about their lives come from CT scans and their closest ...

A tiny fish long feared lost has resurfaced in Bolivia, offering a rare conservation success story amid widespread habitat destruction. Moema claudiae, a seasonal killifish unseen for more than 20 ...

Researchers have rediscovered a rare fish species presumed to be extinct after it was not seen for more than eight decades.

The ivory-billed woodpecker, along with 22 other species of birds, fish, mussels and other wildlife, is set to be declared extinct and removed from the endangered species list, US wildlife officials ...

Hundreds of tiny endangered fish slipped from orange plastic buckets into a glittering lagoon in Malibu on Tuesday, returning home five months after being whisked away from threats wrought by the ...