A two-year experiment found that coral reefs could endure in heated water better than expected—with one huge caveat.

Parrotfish often chomp on rocks and crunchy coral exoskeletons. When they ingest this hard material, it must go somewhere. But where? While relaxing on an endless white, sandy beach might be your idea ...

Coral reefs consist of hundreds of thousands of coral polyps - marine animal invertebrates with hard calcium carbonate exoskeletons. Different species grow to form a variety of measurements and shapes ...

Coral is an umbrella term for several species of marine invertebrates (animals without backbones). They have a hard outer layer (exoskeleton) made from calcium carbonate - the same stuff shells ...

Coral reefs are made up of colonies of hundreds to thousands of tiny individual corals, called polyps. These marine invertebrate animals have hard exoskeletons made of calcium carbonate, and are ...