Wow, I wish i had thought of that also. Truthfully, i thought it unusual so far that I had seen no color variation. That was a great thought to ask for that. My guy got six in, and sent me the pictures to select from. all golden yellow with blue dots.We received our gigas clam from Liveaquaria two days ago. It arrived in rather rough conditions. It measures 2.75”. We asked unique color, bluish or purplish mantle with more spots. We thought ORA has all same color of mantles, gold. We were shocked when she opened. I would say its mantle is purplish brown.