Their reputation as a small and low-maintenance pet belies the havoc they can wreak on an ecosystem, as they can swell to an average of 14 inches long in the wild by preying on native snails, insects, ...

Soar into the world of flying fish. Find out how their amazing talents—that may be used to avoid predators—can sometimes get ...

After being swallowed alive, Japanese eels were able to escape from a predator fish’s stomach and swim to freedom through the fish’s gills, new research shows.

This year's marine heat waves and spiking ocean temperatures foretell big changes in the future for some of the largest fish in the sea, such as sharks, tunas and swordfish.

The alligator gar bears no relation to alligators, but with its wide, crocodilian head and razor-sharp teeth, it’s easy to ...

In a river of central Georgia, a "robust" predator with red eyes swam through the murky water. Something about it caught the ...

A rare, snake-like fish that is able to breathe air and slither across the ground has been caught in Missouri. Officials advise calling authorities if you come across this species.

Fish already face plenty of pressure from overfishing and pollution. Climate change is adding more: warmer waters and ...

PORTLAND, Maine (AP) — This year’s marine heat waves and spiking ocean temperatures foretell big changes in the future for some of the largest fish in the sea, such as sharks, tunas and ...