Julio, do mean " without" problems? you said " with".The bta is so big that it has been completely covering my clam, so the clam closes and cant get light. but the clam has stuck its foot solidly on my live rock, and the bta looks solidly stuck too. I moved a maxima once that had its foot attatched, and it soon died. Are you saying that bta do not sting Crocea clams? thanks