Orcas in the Gulf of California appear to have gained special skills to hunt and kill the world’s largest fish, according to ...

Droughts jeopardize the Amazon's pirarucu fishing economy, urging communities to seek climate adaptation measures.

At first glance, the world’s second largest fish might seem menacing: Its gaping mouth has six rows of teeth in its upper jaw, and nine rows below, for a total of about 1,500 tiny, hooked teeth.

He and the MegaFishes Project plan to help. The world’s largest freshwater fish, many weighing more than 200 pounds, face the biggest threat. Working with a network of more than 100 scientists ...

But at a little over six metres long, this fictional man-eating monster is small fry when compared to the world's largest shark. Sharks are a group of fish with skeletons made from cartilage instead ...

There is no official record-keeping or database of the world's biggest freshwater fish. The Mekong is rich in biodiversity but overfishing, dams and pollution threaten its fragile ecosystem.