New Clues Emerge On How Corals Bleach

Coral reefs, which depend on symbiotic algae for their food, expel that algae in a process called bleaching when they are stressed by heat and other triggers. A new study shows that the sun doesn't need to be shining for this to happen.



via LiveScience.com http://www.livescience.com/39439-coral-bleaching-mystery.html