The heck is this snail lookin lad?

[imarino326]

So I can home with some more zoas, cause I was like zoas are cool, and I see this lad on the top of the cup can anyone tell me what he is? Should I be worried before I stick him the tank tank or is he a friendly boi and is just gonna chill?

 

[VB313]

Stomatella good guy

 

[Detroit_aqua]

I think this is stomatella. Harmless in your tank, good cleanup crew, but they can breed in the aquarium