Tiny flat white shells on glass

[Avp]

Any idea what these tiny flat white shells could be?

 

[lapin]

Maybe limpets?

 

[pseudorand]

I have limpets from AlgaeBarn, and they don't look like that. From the picture, they almost look like mushrooms. I assume they're hard and white-ish though, correct?

 

[sfin52]

There are some limpets in the mix but they look like a shroom or bunch of baby oysters.

 

[Avp]

Yes, they really just look like empty, flat, white shells...very strange

I have limpets from AlgaeBarn, and they don't look like that. From the picture, they almost look like mushrooms. I assume they're hard and white-ish though, correct

 

[SMSREEF]

Plating coralline algae???

 

[JGT]

Resembles baby oysters.

 

[KJ]

Padina sp.

 

[Avp]

Here it is out of the water. It's much darker.

 

[Avp]