Underwater coral nurseries can do more than provide transplants for barren ocean areas. They can also offer a home to all kinds of threatened species.

A new portable tool can assess microbes, screen for antibiotic-resistant bacteria, and analyze algae that live in coral reefs, researchers say.

Fishing practices that selectively remove large parrotfish could put corals at risk, researchers warn.

Simultaneous river runoff and upwelling caused a dramatic die-off of coral reefs off the Texas coast. "One of them alone may not have caused any trouble."

New research finds that reef fish populations depend on two things: good hiding spots and a resident predator.

Deep dives in a submersible gave scientists a glimpse of mesophotic corals, which survive with surprisingly little light.

"These fish are like candy. They are tiny, colorful bundles of energy that get eaten...by any coral reef organism that can bite, grab, or slurp them up."

Bumphead parrotfish poop helps clarify the relationship between the fish and the reefs they call home.

Biodiversity on the level of the Central-Indo Pacific Ocean took tens of millions of years. But human impact could wipe it out in less than a decade.