Elkhorn coral get much of their food energy from the algae symbionts that live in their tissues. The polyps provide the algae protection, suitable habitat, and waste products that the algae use as nutrients In return, the zooxanthellae produce surplus sugars that the polyps use as food. Elkhorn coral polyps also use their tentacles to capture small particles of detritus and also small organisms, including phytoplankton, microbes, and small zooplankton.
Animal Foods: zooplankton
Plant Foods: sap or other plant fluids; phytoplankton
Other Foods: detritus ; microbes
Primary Diet: herbivore (Eats sap or other plant foods); planktivore