Bluefin tuna are an ocean-going fish that grow up to 10 feet long and can weigh as much as 1,200 pounds. Unlike almost all fish, bluefin tuna are warm-blooded and able to regulate their body ...

The Atlantic bluefin tuna is one of the largest, fastest, and most gorgeously colored of all the world’s fishes. Their torpedo-shaped, streamlined bodies are built for speed and endurance.

The bluefin tuna, one of the world's most remarkable ocean creatures, is in trouble and needs your help. Overfishing is driving this mighty warm-blooded fish toward the brink of extinction, and yet ...

A bear-sized bluefin tuna has been sold at a Tokyo market for ¥207 million ($1.3 million), boasting enough fishy flesh to create a sashimi platter that could satisfy an entire school of sharks.

Researchers are investigating the reappearance of Atlantic bluefin tuna off Scotland. The fish were once a common sight around the British Isles, before disappearing in the 1990s. In the last five ...