Coral reefs may look similar at first glance, but their shapes, locations and structures reveal how they form – and how vulnerable they are.

This photograph, taken by an International Space Station astronaut while in orbit over the Caribbean Sea, captures one of Earth’s most alluring ocean locations. The Great Blue Hole lies near the ...

A new study published by oceanographers from the Australian Institute of Marine Sciences (AIMS) found that remote atoll coral reefs are more resilient than previously thought because of their ability ...

The Lighthouse Atoll in the Belize Barrier Reef is featured in this image acquired by Japan’s ALOS satellite. In the upper-central part of the image, an underwater sinkhole known as the Great Blue ...

The reefs at Palmyra Atoll, a small outlying atoll in the equatorial Pacific Ocean, have been undergoing a shift from stony corals to systems dominated by corallimorphs, marine invertebrates that ...

RANGIROA, French Polynesia — Among the Islands of Tahiti, Rangiroa is in a class all its own. 50 miles from end to end, this ring of islands is the second-largest atoll in the world. Captain Noho ...

This striking astronaut photo shows a unique chain of three atolls lined up side-by-side off the coast of Australia. The oval islands were once part of a colossal coral system that rivaled the Great ...

HELEN ISLAND, Palau -- The handful of rangers who protect one of Earth's most remote and biologically diverse reefs have only each other for company for months at a time. They worry about running out ...

FILE PHOTO: Aerial view of the contested Second Thomas Shoal in the South China Sea BEIJING (Reuters) -China said on Monday "illegal" beaching of Philippine warships at the Nansha islands in the South ...

Rosie knows the Lighthouse Reef Atoll like the back of her fin. She calls this atoll home and is a matriarch of the thriving population of Caribbean reef sharks (Carcharhinus perezi) living there. Her ...