This story appears in the December 2013 issue of National Geographic magazine. On ice floes and rocky beaches in the far North Atlantic, cinnamon brown blobs pile up in living heaps. Some weigh ...

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.

What is an Atlantic horseshoe crab? Atlantic horseshoe crabs may appear alien, but their history as earthlings is pretty impressive. They’ve been around for 450 million years, predating the ...

part of the North Atlantic gyre. A weed mass this small may shelter thousands of organisms, from larval fish to seahorses. This story appears in the June 2019 issue of National Geographic magazine.

Today 40-odd sites around the North Atlantic harbor some 400,000 nesting pairs, plus tens of thousands of juveniles and nonbreeders. One large colony resides at Hermaness, a national nature ...

This story appears in the June 2014 issue of National Geographic magazine ... adorable-looking Atlantic puffins. Smallest of the four puffin species, they have come en masse to breed on Britain ...

This story appears in the October 2019 issue of National Geographic magazine. When North Atlantic right whales migrate along North America’s eastern seaboard, they run a gantlet of fishing lines ...

This story appears in the February 2018 issue of National Geographic magazine ... A sun star clings to tree kelp in the chilly South Atlantic off the coast of Bird Island in what looks like ...

You can’t mistake an adult Atlantic spotted dolphin for anything else—the spots are a dead giveaway. This gregarious cetacean isn’t born with those beauty marks, however. Calves start out ...

Oceanxplorers, a new documentary series from National Geographic, invites us to dive ... of various marine ecosystems—from the Atlantic’s dark depths to the icy waters of the Arctic—uses ...