Zooxanthellae coat the outside of a coral polyp. This curious little dinoflagellate performs as a symbiote to a coral in this fashion: the carbon derived from photosynthesis is then transferred from the zooxanthellae to the coral. In turn, the coral can supply nitrogen to the dinoflagellate from one-celled organisms it catches as food. Nitrogen is the nutrient required by algae and phytoplankton to be transmuted to energy.

Log in or register to write something here or to contact authors.