Researchers on an expedition in Peru have discovered 27 animal species new to science – among them a “blob-headed fish” and a type of semi-aquatic mouse.

The giant freshwater stingray may be the world’s largest freshwater fish. It’s also cloaked in mystery. No one is sure how many giant stingrays are left, which habitats they prefer ...

The Mekong giant catfish has one of the fastest growth rates of any fish in the world. It can reach up to 440 pounds in only six years. They can live up to 60 years. Highly migratory, the species ...

“The blob-headed fish has an incredibly bizarre head that looks almost like a giant swollen nose,” Larsen told CNN. “Scientists have never seen anything like it, and we don’t know what the ...