<a href=showthread.php?s=&postid=13880491#post13880491 target=_blank>Originally posted</a> by a4twenty
looks like byssal thread can't really tell for sure if the foot is there or not ( blurry ), if it is it's quite swollen.
is it attached to the clam?
have you recently moved the clam?
what size is the clam?
larger clams can drop their foot if they no longer need it but if it was removed by force the clam usually doesn't survive.