HELP! WTH is this thing I just found in my tank?

[GQadam]

I need some help again gang. I found this thing in my tank this morning. It has a hard shell like a snail but it has antennae like a slug. What is it? I removed it from my tank. Its now in a Petri dish alive and well until I get some feedback on what to do with it. So here are some pics:

 

[Turbosnail]

stometella(spelling?) snail there ok good grazers.

 

[GQadam]

stometella(spelling?) snail there ok good grazers.

Are we positive? He was stuck to the side of the tank just like one of the other bigger snails but obviously I didnt put him in there so I was concerned. He may have snuck in with the last piece of coral I had put in. I was in a rush and didnt dip it as thoroughly as I would have. Its not that I dont believe you Turbo I would just like a bit more feed back before I throw the little sucker back in Thank you for your input.

 

[TomD]

Yes...They are good. I have some that come out at night. There are only a few snails that are common to find that are bad such as whelks, pyramids, sundials etc.

 

[DoctaQ]

harmless, stometalla i beleive

 

[Muddskipper35]

Harmless and good for the tank.. Throw it back in there..

 

[jtmac]

very good grazers