Porites astreoides, also known as the mustard hill coral, is a
flat coral with a hemispherical shape. It is typically a yellow to brown color covered with
small bumps with and is mainly found in
Florida, Bahamas, the Caribbean, and the Bermuda (Sterrer, 1986). Colony growth
mainly occurs on reefs and open inshore waters from
half a meter to 15 meters (Sterrer, 1986). P. astreoides grows
at an average of 3.5 mm per year in Bermuda and depending on other
locations and conditions, it can grow anywhere from 3.0 mm per year to
4.75 mm per year (Sterrer, 1992). Like many other scleractinian corals,
P. astreoides has a symbiotic relationship with dinoflagellate
zooxanthellae from which it gets nutrients and energy for growth and calcification (Lasker, 1981). Recent studies on P. astreoides have focused on coral bleaching (Souter and Linden, 2000).