A SPECIAL RELATIONSHIP

Nearly all of the reef building corals contain single celled microscopic plants (algae) called symbiotic algae, or zooxanthellae within their tissues. This is what helps to give coral its color. They live in a close (symbiotic) relationship from which both the coral and the symbiotic algae benefit. A single zooxanthella is about 10 microns in diameter equivalent to about the thickness of a huma