looking for an ID
 

Anyone know what this thing is? I discovered it the other night after lights out. Sorry for the poor photos, they were taken using a video camera & flashlight. Anyway the (nudibranch?) looks all black except for a thin white stripe in the middle of its back and is about the size of a loonie. Shown here with the glass reflection creating a mirror image so you can see its top and underside. I am also assuming it's reef safe as I have no idea how long it's been in my tank or where is originated from.

http://www.canreef.com/photopost/dat...nudi_004_1.jpg


http://www.canreef.com/photopost/dat...n_nudi_001.jpg

Could be some kind of limpet.

They're great algae grazers and come in many different colors.

Looks like a keyhole Limpet. I have two in my tank and they eat lots of algae.

Cool thanks for the info.