QUOTE (FiReBrEaThInGCuTtLeFiSh!XD @ Oct 4 2009, 05:27 AM)

Couple questions - I had difficulty finding this information and I did just pop my clam cherry so please be patient with my question and thanks in advance: My huge pods were crawling over the clam's shell (as they do everything else) and it kept retracting only small parts of its mantle in reaction to it( close to where they brushed the underside of the mantle. I'm assuming this is natural? Should I be overtly worried as to this stressing out the clam, or is this just a standard occurrence in our aquaria and out in their natural environment? Also, about how long should I expect it to take for the byssal gland to fully attach to the rock underneath him? I know that maximas don't exhibit symmetry, and on end of the mantle is smaller than the one end by the intake siphon, is this also normal?
THX for tagging along.
Clams do not like being touched. If something bumps the mantle, they will not usually fully retract; rather they just pull up the part of the mantle that was touched. So yes it is normal, and no it won’t do any damage to the clam. If the clam is being overly harassed, it will fully retract, usually in a quick motion, and expel water with force to try and move whatever is bothering it away.
Clams can take up to a week to attach, sometimes even longer. It really depends on how comfortable the clam is with the spot it is sitting in. If it is happy it shouldn't take too long, but if there isn't anything suitable for it to attach to, it may only have attached to a few pieces of substrate making it seem like it hasn't attached to anything at all.
Lastly, your clam looks fine. There is no real rule of symmetry or proportion when it comes to a clam’s mantle. As long as it is not pinched (which it isn't from what I can see) and as long as the SHELL aligns well, then you have nothing to worry about. The large teardrop in my Solana is wider at the inhalant siphon end than at the exhalent siphon end, which seems to be typical for maximas.