Thank you all for the responses, after looking up a whelk I too think that is it one. I have it in a quarantine right now waiting for me to make up my mind. As he is quite tiny I don't think he would make much of a meal so I am not going to eat him =P. I really no preference to what I do with him so I might just toss him into my fuge and let him live his life in peace. My only concern with that is that I have a few snails in there just to keep things a little cleaner, will they be any threat to them? And if not is there any other reasons keeping one might turn into a problem down the road?