Betta fish are one of the most popular aquarium fish in the world. Here is what to know about bettas, including how long they ...

It’s an extraordinary fact: 51% of all known species of fish live in freshwater - 18,075 species. And more are being discovered all the time. But few people have any idea of the unimaginable diversity ...

One of Earth’s biggest freshwater fish is bouncing back One of Earth’s biggest freshwater fish is bouncing back Enormous stingray sets world record for largest freshwater fish Enormous ...

The giant freshwater stingray may be the world ... where their more commonly known relatives live. These ancient fish, little changed over many millions of years, can reach 16.5 feet long ...

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 ...

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 ...