ID please

[Tanker Bob]

I just saw this sprouting up yesterday. They are small, white and kinda look like a mushroom. The other bright white stuff is sand/gravel from goby.

 

[Bfragale]

It’s hard to tell- could you get a photo under white lights?

could be some kind of palys?

 

[Tanker Bob]

It’s hard to tell- could you get a photo under white lights?

could be some kind of palys?

Here's a couple with filter on.

 

[KJ]

Acetabularia calyculus.

 

[Idoc]

+1

These are actually really amazing. Each one of those umbrellas and stalks is a single cell. I had a couple on the backs of snails before that looked like they had satellite dishes.

 

[Tanker Bob]

Thank you all for your assistance. Sounds like this is not a harmful algae and may get eaten. I'll watch to see growth.