This fan is usually seen on vertical walls of the outer reef in depths between 10-30 m (33-100 ft). The colonies form an intricate network of rectangular meshes, attaining their largest size and most spectacular growth forms in places where currents are especially strong. In prime positions these fan are up to 2-3 m (6-10ft) high and measure more than 3-4 m (10-13 ft)in width. The fans invariably project form the reef's surface at angles offering maximum exposure to the prevailing current, which supplies nourishment in the form of plankton. Color usually ranges form cream to pale pinkish orange. One variety's red color is due to a thin algal coating. Alcyonarians rarely harbor encrusting organisms such as algae, sponges, and sea squirts, as their abundant feeding polyps and various chemical researchers are analyzing the chemical makeup of these species, in an attempt to discover substances that will inhibit cancer and other diseases.
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