Ok, here are a few more pics that show the shell and exterior of the clam. Currently, it is not attached to any rock or substrate but I also just bought him.
Malofish - I see you live in San Antonio. I'm headed there this weekend and was wondering if you know of any fish stores that I should check out. I've been to this run down place called Fintique, a nicer place on Bandera and one a little off of I-10 & 410 near a U-haul place. Any more places??