Facts about Coral Reefs

1. 02

   Coral polyps expel their symbiotic algae when water temperatures rise just 1-2 degrees Celsius above normal, causing bleaching that can kill entire reefs within weeks.

   Coral ReefsMay 5share
2. 01

   Coral reefs support approximately 25 percent of all marine fish species despite covering less than 1 percent of the ocean floor.

   Coral ReefsMay 5share