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 ...

From the fearsome piranha and vampire fish to the mighty anaconda, the crocodile, and the candiru, these are among the most terrifying reptiles, insects, spiders, and fish.

The giant freshwater stingray may be the world’s largest freshwater fish. It’s also cloaked in ... because weighing the enormous and awkward animals is very difficult. Brown to gray in color ...

Mussel shells provide living space for insects and plants, and empty shells serve as nesting sites for small fish like darters. Unfortunately, for all their allure, freshwater mussels are the most ...

Whipsnade Zoo is fighting the extinction of a freshwater fish species recently found in their care by starting a new ...