The underwater skyscraper teems with sea life and had been overlooked in past surveys of the reef system.
Researchers in Australia blamed climate change for the loss, which they said could diminish critical habitats for fish and other marine life.
On occasion, different species of angelfish produce hybrid offspring even more colorful than the parents.
The recently discovered species covers coral in a thick layer and suffocates it. Scientists don’t know where it came from.
A recent expedition to the inky depths of the Coral Sea revealed an unknown world of creatures and geologic features.
Under stress, certain coral species put on displays to try to re-attract symbiotic algae they need to survive.