A fish species thought to be extinct has suddenly been found in a small pond in Bolivia. The rare seasonal killifish, Moema claudiae, has not been recorded in the wild for more than 20 years and its ...

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

For decades, the coelacanthexisted only in fossil records—until one turned up in a South African fishing net. It was 1938 when a museum curator in East London noticed an unfamiliar fish in a haul from ...

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 ...

A new study, published on May 21 in the journal Nature, has revealed surprising information about the origins of human teeth. Our teeth evolved from the piercing “body armor” of extinct fish, which ...

The "Mekong ghost" has resurfaced. After nearly two decades without a trace, the elusive giant salmon carp (Aaptosyax grypus) has been spotted once again in the waters of Cambodia, reigniting hope for ...

For 162 million years, sturgeons have fended off everything they’ve faced. Now scientists are racing to save these living fossils. The white sturgeon is the largest freshwater fish in North America; ...

There are plenty of contemporary creatures that inspire fear. For example, the northern green anaconda is the heaviest snake in the world and weighs more than a football player. Should you encounter ...

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 ...