With too few tritons on the reef, crown-of-thorns starfish populations can explode, jeopardizing the living coral that makes up reefs. Covered with long, venomous spikes, the crown-of-thorns ...

Beneath the soft bodies of scleractinian, or stony corals, polyps secrete a calcium carbonate skeleton, and it is this skeleton that becomes the foundation of coral reef ecosystems. Coral colonies ...

He captured the Great Barrier Reef during its latest—and most devastating—mass die-off, and documented how coral off the coast of Belize had partially recovered thanks to a no-fishing zone.

Teeming with life, a healthy coral reef is one of the noisiest places in the ocean. Recorded using underwater microphones, this cacophony can sound to our ears remarkably like frying bacon. Listen for ...