The extremely warm ocean temperatures off the coast of Florida have been damaging coral reefs. Australia has experienced coral die-offs as well, beginning in 2015 at the Great Barrier Reef, when heat ...

Some fish can communicate with other species by changing the colour of their bodies – as this incredible footage shows.

The humble clownfish is smaller than a human fist. But when a diver approaches its underwater home, among the tentacles of a sea anemone on the world's coral reefs, the little orange creature rears up ...

Parts of Australia’s iconic Great Barrier Reef, famed for its stunning colors and biodiversity, suffered the biggest decline of coral on record last year after a marine heatwave bleached vast swathes ...

Great Barrier Reef, Australia (CNN) — As the early-morning sun rises over the Great Barrier Reef, its light pierces the turquoise waters of a shallow lagoon, bringing more than a dozen turtles to life ...

Two-thirds of Australia's Great Barrier Reef showed the largest amount of coral cover in 36 years, experts reported on Thursday. However, the reef remains vulnerable to increasingly frequent mass ...