White spots slowly spreading on rocks

[kdx7214]

So I somehow have these white spots, shown below, showing up. First they appeared on the zoa frag. I removed it, dipped it again, and put it back and still there (yes, I scrubbed it with a toothbrush lol). Now they're showing up on the bivalve as well. Any idea what these could be?

Edit: I can't get the pics any clearer - all I have is a phone camera

 

[Chortanator]

They look a little bit like keyhole limpets to me, are they raised? Can you scrape them off with a razor blade?

 

[Vinman]

So I somehow have these white spots, shown below, showing up. First they appeared on the zoa frag. I removed it, dipped it again, and put it back and still there (yes, I scrubbed it with a toothbrush lol). Now they're showing up on the bivalve as well. Any idea what these could be?

Edit: I can't get the pics any clearer - all I have is a phone camera

What kind of snails do you have

 

[monkeyCmonkeyDo]

Nerite snail.eggs

 

[fishface NJ]

looks like spirobid

 

[vetteguy53081]

Nerite snail eggs and will likely get eaten before they would hatch

 

[monkeyCmonkeyDo]

I googled how to hatch them and ya its unlikely. Lol. Prob did that month or so ago.
D

 

[kdx7214]

What kind of snails do you have

I have ceriths, nerites, and trochus snails in the tank. The thing is that these don't move. Once they're there, they are there. The ones on the zoa frag plug have been ~ three months.

Also, they are only raised maybe a millimeter. I have snail eggs everywhere but they don't look like that. I have a crap ton of baby snails on the back wall of the tank as well.

I guess I'll keep an eye on them and see how they develop.

Thanks everyone!