Some kind of snail?

Being new to saltwater I havent gotten a clue what this. Anyone?

 

Looks like a nudibranch. They're beneficial as long as you don't have too many. If they run out of algae to eat they will starve.

 

Wont eat my corals unless its a zoa eating one correct?

 

Correct, which I cannot confirm at the moment.

 

Are those spines, on it's back or do they look like spots? From the picture, I can't tell.

 

spots, it looks like a shell to me

 

if its a actual shell I don't think its a nudibranch maybe a cowrie

 

i believe i may have found it Stomatella Varia

 

Yeah if it is a shell then is is a stomatella

 

ok, thanks for the help