Who is this?

[IriskaD]

A round thing in the rock, in the middle of the picture. It's slowly moving about.

 

[Dav3]

Limpet maybe.

 

[coltonwsmith]

Asterina starfish.

 

[Dav3]

Asterina starfish.

Not sure if you read what the OP posted. Certainly not an asterina starfish

 

[Sniperhank]

Looks like a limpet to me.

 

[nightowl2k]

I say limpet..@

Sent from my SGH-T999 using Aquarium Advice mobile app

 

[mrkellis]

nice duncan mine is still slowly opening

 

[coltonwsmith]

Oops, I guess I looked at the wrong creature.