What is this??/

[Fireworm]

I found this in the back of my tank the other day and had to move it to the front for a few pictures. It is hard, and blows around the bottom of the tank like tumble weed. Any ideas????/

 

[Fireworm]

Does anyone know?? Come on guys give the newbe a break....

 

[rustybucket145]

I have no idea, but it looks pretty cool.

 

[KyleP]

I think its a type of branching coralline. I saw some on floridapets.com called coraline clusters.