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 ...

but its popularity has gotten the fish into some pretty deep water, and it might not be available forever if overfishing continues. Lake Superior's cool freshwater habitat is ideal for walleye ...

Six critically endangered Mekong giant catfish — one of the largest and rarest freshwater fish in the world — were caught and ...

A 300kg (661lb) stingray caught in the Mekong river in Cambodia is the biggest freshwater fish ever documented, scientists say. It unseated the previous record-holder, a 646lb (293kg) Mekong giant ...

Freshwater fish populations that dwell nearer the poles are outperforming their equatorial counterparts, researchers have found.

These fish prefer perennial streams fed by cool springs with overhanging riparian vegetation ... More than 80% of California’s native freshwater fishes are in decline, an indication of the degrading ...

These fish require perennial streams fed by cool springs, with riparian vegetation habitat and ... More than 80% of California’s native freshwater fishes are in decline, an indication of the degrading ...