The biodiversity of Earth's oceans is disproportionately concentrated in coral reefs—the vibrant undersea ecosystems where ...

Coral reef halos, visible from satellites, can indicate reef health by reflecting predator presence and coral layout.

These are the prettiest freshwater fish, from vibrant brook trout and pumpkinseed sunfish to majestic lake sturgeon. Check out how these species made our list!

Most fish species feed on prey floating freely in the water by sucking in a mouthful and trapping anything inside it. But on reefs, about half of fish species feed by grazing on algae or other ...

Some of the animals “likely arrived during recent El Niño phenomena” when ocean currents “temporarily reversed” direction, ...

Ever since Charles Darwin, scientists have assumed species facing the same problem often evolve similar traits. But that’s not always the case.

The task force leading U.S. efforts to preserve and protect coral reef ecosystems recognized the coral reef and fisheries ...

The coral reefs of Palmyra Atoll, part of Pacific Islands Heritage Marine National Monument, provide nurseries for many fish ...