Coral reef ecosystems are generally high in biodiversity, most often found in shallow tropical seas, and are threatened by factors including ocean acidification, global warming and sea level rise.

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 ...

The kikumeishimodoki, or zebra coral, lies about 20 meters off the coast of the Kamo district of Tsuruoka in Yamagata Prefecture, which faces the Sea of Japan. The northern limit of the reef ...

Those polyps clone themselves over and over again, eventually forming larger coral colonies that build reefs. That’s how typical reef-building corals, like the iconic elkhorn and staghorn ...

Researchers have found that reef fish from the Arabian Gulf, the world's hottest sea, exhibit a higher tolerance to temperature fluctuations compared to those from more thermally stable coral reefs.

Record ocean heat has taken a devastating toll on one of the world’s greatest natural wonders, with coral bleaching on Australia’s Great Barrier Reef reaching “catastrophic” levels ...

Coral reefs are some of the world's most diverse ecosystems. Despite making up less than 1% of the world's oceans, one quarter of all marine species spend some portion of their life on a reef.

With the help of remote underwater video cameras, an international team of scientists has analyzed the spawning aggregation dynamics of the black-saddled coral ... cameras in a reef passage ...

And with the documentary “Reef Builders,” which recently premiered during SXSW, she shines a light on coral reef restoration efforts. “Truthfully, not everyone is able to make an impact.