Each killer whale has a distinct pattern of pigmentation behind its dorsal fin. How do these patterns vary around the world?

Decades after they were hunted to local extinction, fin whales are recovering in the Kitimat fjord system—only to be threatened by a booming LNG industry.

A unique fjord in Chilean Patagonia gives scientists a chance to unlock the reproductive secrets of cold-water corals that ...

Decades after they were hunted to local extinction, fin whales are recovering in the Kitimat fjord system—only to be threatened by a booming LNG industry.

In Hawai‘i, people, pigs, and ecosystems only have so much room to coexist, and the pigs exist a little too much.

A unique fjord in Chilean Patagonia gives scientists a chance to unlock the reproductive secrets of cold-water corals that typically live thousands of meters below the ocean’s surface.

Each summer, thousands of bluebottles (also known as Portuguese man-of-wars) wash up along the shores of Sydney, Australia. These remarkable relatives of jellyfish are actually colonial organisms: ...

One Great Shot: Are You Ready for This, Jelly? During a nighttime dive, a veteran underwater photographer captured a tiny fish’s cunning effort to find a safe spot in a dark sea.

A massive environmental calamity rocked the ancient Mediterranean. It took millions of years for the ecosystem to recover.

New research estimates that some 200,000 birds are accidentally caught in fishing gear in Europe each year.