ID help

[hopperjl16]

Anyone know what this guy is? Sorry it’s not a great pic. He has a shell kinda like a snail, but the edges of it are always flush to the rock, so much so that I thought he was part of the rock until I realized he was changing places day to day. Super slow mover, no visible movement if you watch it. No “foot” that I’ve ever seen. And eats the purple coralline, nothing else. Just wondering if it’s something I need to remove. I’ve seen it in my tank for months and it’s gotten larger, though still less than 1cm in size.
Thanks!

 

[reef lover]

Limpet beware of the keyhole varieties they like sps..

 

[Lovemyreef2015]

+1 limpet, good cuc.

 

[jsker]

Limpet beware of the keyhole varieties they like sps..

+1 limpet, good cuc.

Nice work ladies

 

[hopperjl16]

Thanks! How do u ID the “keyhole” varieties? I have a monti near where this guy has been feeding and he’s never touched it.

 

[KJ]

Keyhole limpet.