It definitely looks like that!Looks like a stomatella, a snail with a soft 'shell'.
Good cleaners, reef-safe, nocturnal, hunted by peppermint shrimp and 'lined' wrasses in underfed tank, easily reproduce if they survive long enough, if threatened they drop their hind end like a lizard dropping its tail.
Source: did some research when I found this guy on a rock...