Limpet ID

[faiyaz2]

Can anyone ID this limpet for me? What exactly is it? Is it reef/fish/invert safe?

 

[FrikkieVanDieVrystaat]

Great for removing hydroids. BUT can be a problem in a reef tank and may bother zoas. Keep an eye on em. They are called keyhole limpets. There is not a lot of info on them out there.