I have 2 crocea clams and have another coming and a squamosa next week. The top clam was just purple in the tank where I got it and is now really blue.These are shots through the glass not top down.
I'm jealous. I can't have clams. One of our fish likes to munch on them. But he was free to us because he was eating his clams. So I guess I can't complain too much.