Discover the bigmouth buffalo fish, a 100-year-old freshwater marvel that defies aging and faces an uncertain future. Learn about its biology and conservation.

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 ...

Getty Images Large fish such as sturgeon are dying out faster Carmen Revenga of The Nature Conservancy said freshwater fish are a diverse and unique group of species that are not only essential ...