I have spent years caring for Tridacnas and finished my thesis about them. In the times I've cultured them this is the first time I've seen any Tridacnas with different patterns and coloration on their mantle. Is there any possibility of Chimerism in Clams? This maxima was found like this during the grading of the 1.5'' and lastly before it was sold it was 3" and the color and pattern remained the same during the grow-out stages