What is a Coral Reef?
7 min read Preparations for Next Moonwalk Simulations Underway (and Underwater) Juvenile black, white, and yellow-striped Bluehead wrasse fish dart in and out of a dead colony of pillar coral (Dendrogyra cylindrus), now covered in various algae, in the waters of Playa Melones, Puerto Rico. NASA Ames/Milan Loiacono Coral reefs cover only 1% of the [...]