Unknown creature

[Arnwolf]

Hello I’m new to this form. I have a 72 gallon reef tank that is a work in progress. Life has just started to come out of the rock I have. Can someone please ID this creature for me. I hope it isn’t a pest. It looks like a snail and it is eating the red algie

 

[Tahoe61]

Stomatella, great invert to have.

 

[Arnwolf]

Thank you for IDing it