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 ...

On the night of 13 June, a local fisherman on Koh Preah island called to tell researchers that he had caught a "very big" stingray - it turned out to be 3.98m long and 2.2m wide. After being ...