So I found this snail yesterday which is very tiny and these are best photos I could get. If he is a hitchhiker I'm surprised as I don't have any live rock and just have a few coral frags from 2 weeks ago which where dipped etc prior. the snails I have in the tank are
2x nassarius
2xbumblebee
2xcerith
1xastrea
1xconch
2x nassarius
2xbumblebee
2xcerith
1xastrea
1xconch