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 ...

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 ...

Native to China’s Yangtze River, the Chinese paddlefish was thought by many to be the world’s largest freshwater fish, with reports of individuals reaching a mind-boggling 23 feet in length ...

With their beautifully colorful shells, diversity of shapes and interesting adornments — including ridges, bumps and spikes — they've earned intriguing common names like fuzzy pigtoe ... and empty ...