Just a quick note to let you know that this little guy was in a bag of snails I received from you in my second order. He was pretty small when you sent him about a month ago, smaller then a dime and this is what he looks like as of today, quarter size. Any idea what type of urchin he may be? Any concerns that I should have about him? He's currently housed in a 56G. He's quite amusing and he really makes his rounds in the tank.