This specimen is 2.5-3 inches
Every Deresa clam is unique. Both in colors & patterns, therefore I will post WYSIWYG (what you see is what you get) pictures & size information when I can.
Note: NEVER feed clams! They gain 99% of their nutrition from photosynthesis. Deresa Clams need strong reef lighting and should be placed on the sand or a rock crevice as they do not attach themselves like the other clams species. Be careful if you move them as you may lethally damage them. Considered to be the hardiest of all the Tridacna clams.
NEVER take clams out of the water!! If air gets trapped inside, it can kill them.
Special Acclimation is needed! With tank lights off, do not open their bag & float for 15 minutes to equalize any temperature difference. After 15 minutes, open the bag, check the bag salinity with a refractometer & if your tank is more than 2 degrees different than their bag DOUBLE the acclimation! Continue to float & gently start adding some of your tank water to the bag. On average the bags I use for them will need 1/2 cup every 15 minutes - do this for an hour then submerse the entire bag under your tank water and gently take them out of the bag & place in a lower region of your tank. My water is reef water & is totally safe to add to your tank.
Max wild size is 24 inches
Pictures are examples only unless noted by WYSIWYG