These are the world’s longest-lived freshwater fish. Some reach 127 years old, a feat previously thought impossible for ...

The giant freshwater stingray may be the world’s largest freshwater fish. It’s also cloaked in ... at least 70 giant stingrays, with few large rays having been seen there since.

The Mekong giant catfish is the official freshwater ... 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 requires ...

All steelhead start life as rainbow trout, but not all rainbow trout will become steelhead. Confused? You’re not alone.

Water is a big part of our lives ... Water does end up going into freshwater fish’s mouths, but instead of swallowing it, the ...

WWF works to sustain the natural world for the benefit of people and wildlife, collaborating with partners from local to global levels in nearly 100 countries.

Medieval European fishermen first took to the open seas in about AD1.000 as a result of a sharp decline in large freshwater fish, scientists have suggested. They say the decline was probably the ...

In an Australian first, researchers have described a new species of 15-million-year-old fossilized freshwater fish, Ferruaspis brocksi, that shows preserved stomach contents as well as the pattern of ...