Originally Posted by jonthefishguy
That is a box snail.They have a tendancy of eating polyps such as zoanthus, palythoa, and protopalytoa. They generally will be found within the colony itself and eat at the base and remove not only fluid but flesh. the best method to remove them, is by hand.
Are you sure? Just my freakin' luck. So far they are not on my zoos, hopefully I can get them outta there before they do any harm.