The Crocea Clam has the same requirements as the Maxima and Deresa Clam and is often mistaken for the Maxima. The mantle is more fluted on this clam which is really the only giveaway that it is not a Maxima. They require strong lighting (being a shallow water species) and good water quality to thrive in the reef aquarium.  However if their color is more brown this is a sign of their zooxanthellae showing and should be placed in less intense lighting until their protective coloration re-establishes.

Try to obtain a specimen that is at least 2 inches preferably closer to 4 inches.  The Crocea Clams max size is only 5-6 inches making them the smallest of the ‘giant clams’.  They should be placed in the substrate or on the rocks near the top half of the aquarium so they receive sufficient lighting.  Give them time to adjust to their new surroundings and avoid major fluctuations in lighting, flow or water parameters.  If they are position where flow causes the mantle to fold upward or close are not able to open fully they will eventually starve.