At the end of the recent Frag Swap I attended in Tennessee, I asked the seller how much he wanted for all the Maxima clams in his tank. "Seriously?" he asked, and I said yes. After a little deliberating, we agreed on a price and he bagged each one up for me. They were in small clam cradles he'd made with frag plugs and two-part putty. If the clam was attached, he bagged it that way. If they were loose, the clam was bagged by itself and the cradles were ...