Another ID thread.

[ReefAddict]

Got these popping up in my frag tank. They are mixed In with the coralline. Might even be a type of coralline. Gotta say I’ve never seen these in my time doing this.

they are black on the back and when I pop them off they have this swirl. See picture.

 

[KJB]

Not a clue...

Free bump

 

[ReefAddict]

Anybody?

 

[BiGGiePauls33]

Possible plating Coraline.

 

[elaminator]

Vermetidae snails.

 

[dz6t]

Vermetidae snails.

+1

 

[ReefAddict]

+1

i wondered if they were vermetid snails but there’s no worm in them at all and no web at all coming out to catch foods.

 

[dz6t]

Can you find any small openings on the other side of these lumps?

 

[ReefAddict]

Here they are on a cleaned off frag rack:

 

[mikewillbrown]

From outside the tank it almost looks like tunicates