I have had a Maxima clam for about 9 months now. It was about 3.5" when I purchased it, and it has grown some since then. It's always been in the same place on the sandbed (24" deep). I've never had any problems with it, until recently. I changed my lighting to LEDs back in October (from 250W MHs), for those that do not know. The clam seemed to respond just fine, there was no change in mantle extension, so I left him be. About a month ago, the mantle seemed to be getting a bit "blotchy" on the left side. There were some vementid snails which had attached to the shell on that side, and I assumed their fishing lines were bothering the clam. So, I snipped off their tubes and made them go away. Since then, the mantle has gotten worse. There are now some areas on it that are nearly snow white. The mantle still has the same extension, and has never retracted or gaped. The clam still responds normally to light changes. Can you bleach a clam? I didn't think this was possible with a Maxima, especially at that depth. I'd think my corals up top would be toast if that was the case, but alas, everything else in the tank is thriving. Other ideas? I will get pics later, but besides the lack of color, nothing appears wrong.