No; if your turbo snail lost its shell, it would die. This guy has his shell still - its probably a Stomatella snail of some variety.
How could it have got in my tank?
Then it probably hitchhiked in on something before that and has been hiding since - rock, coral, algae, etc.; pretty much anything wet could carry hitchhikers to our tanks.
I’m not sure if a dip would knock them off or not, so both are possible.
Lots and loads of hitchikers can appear years... honestly years after introduction of a new frag plug, I would not worry too much if this weird 'slug' creature is not causing harm, it will probably die in a week or two
As other have said, its a Stomatella snail. They hitchhike in as super tiny or even as small larva and nearly always and eventually appear in the the aquarium. Most dips wont effect eggs, so if they can arrive in that fashion as well.
