Looks like a nassarius but could also be a whelk. Does it burrow in the sand or go in the rock? If it doesn’t burrow in the sand, then it’s probably a whelk. I know the whelk has no problem reproducing in a reef tank and they will kill other snails. Another way of telling the difference is the whelk has a pattern on his snout and body, whereas the nassarius is a solid color