A report has warned of a "catastrophic" decline in freshwater fish, with nearly a third threatened by extinction. Conservation groups said 80 species were known to have gone extinct, 16 in the ...

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 ...