It is an amorphous shaped sponge that grows in flat, sometimes bulbous sheets in benthic communities. It is sometimes found in marginal, stressful systems such as caves. Such sponges are white, lacking access to sunlight, and photosymbionts. It is known to be preyed upon by the hawksbill turtle, Eretmochelys imbricata.
(From Wikipedia, February 2015)