Please Identify!

[55mixreef8236]

So today I was looking for hitchhikers like usual and I saw a little snail/slug/nudibranch thing. It was about a centimeter long and was a creamy white with grey dots. I couldn't get a picture because he slid into a small cave. Does anyone know what he is?

 

[Sugar Magnolia]

It may have been a stomatella snail. They resemble slugs but have an oval shaped shell on their back.

 

[55mixreef8236]

Thanks. I looked on google images and thats what it was. Should I be worried about him or is he reef safe?

 

[J2T]

Reef safe, a beneficial algae eater