From the web The Derasa Clam is also referred to as the Southern Giant Clam or Smooth Giant Clam. The latter name refers to the relative lack of ribbing and scales on the shell. The smoothness of its thick shell, and the 6-7 vertical folds helps to differentiate its species from T. gigas, its larger relative which is not as smooth and has 4-5 folds. In an aquarium, however, scutes may develop on the Deresa Clam. Its mantle is a mixture of orange, yellow, blue, and black and white, and usually has a wavy striped or spotted pattern, usually with vivid blues and greens. It has a narrow byssal opening and the incurrent siphon has tentacles. This species is one of the largest of the "giant" clams, and grows rapidly, reaching a maximum size of approximately 20 inches. Under the proper conditions, smaller Derasa Clams can double or triple their size in less than a year. Those in the aquarium trade are usually cultured.
The Derasa Clam is the most widely available and hardy of the Tridacna clams. It needs bright lighting supplied by metal halide lamps to live, grow, and keep its intense colors. The type of lamp will depend on the depth of the tank and the position of the clam. A daylight fluorescent tube is also recommended. The Deresa Clam requires calcium levels of 400-480 mg/L, and a carbon hardness of 7 to 12 degrees. Proper levels of strontium and iodine are also needed.
The Deresa Clam relies heavily on the photosynthesis of the algae growing in its mantle. However, it should be fed daily with a yeast-based suspension unless the tank is populated with fish and corals which are fed regularly. It also requires nitrogen for proper growth, and if the nitrate level is too low, additional nitrate should be added, but the level should not be higher than 2 mg/L.
I personally have never seen them that small
.so does that make it hard?
Henry when will she learn.
