What do corals eat?

Corals eat mostly microscopic – sized plant organisms which float in the water. They also could have a symbiotic relationship with single-celled algae called zooxanthellae. Corals and algae are like good friends who helps each other. What is more, zooxanthellae play a role of a cook who prepares food and feeds coral. Because of this relationship, coral reefs grow much faster in clear water, which admits more sunlight.