Can someone help me ID this?

[nirrad]

I found this is my tank. I've seen it several times at different places in my tank.

Anyone know what it is?

Thanks in advance.

 

[Sk8r]

Eggs. Snail or nudibranch, would be my guess. Since nudis generally go into the filter fairly quickly and it's reproduced more than once, probably snails.

 

[outrigger]

wierd!

 

[ReefWifey]

In your third pictures there is the dark spiral in the background, then a small white curl. That small white curl looks just like the nudibranch eggs I get in my tank. If you remove it with tweezers it is hard, and sticks hard onto surfices. Do you have alot of Zoas? The nudis can eat Zoas.

 

[Brian5280]

OooOOooOoo, Tank Circles. They are probably related to Crop Circles.