Pyramid Snail?

[koa25]

Just did a massive cleaning of my tank and an hour later saw 2 of these guys crawling around. Is this a pyramid snail? When I looked them up they are normally white as far as I can tell. This guy has brown. I'm assuming he snuck in on my zoa colony cause I used only dry rock and crushed coral sand bed. I don't have a clam to worry about. Just curious for future reference. http://img.tapatalk.com/d/14/05/10/de9udypa.jpg

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