Is this some type of sponge?

[jfjt7]

What type of spong is this, if it is some type of sponge at all, it’s been growing in my tank for a while now but I haven’t put much thought into it. Could anyone tell me something about it? It’s the red/purple organism.

 

[Gablami]

That looks like matted cyanobacteria to me.

 

[xxkenny90xx]

Could be a sponge but looks like cyano to me. Does it easily blow off the rocks?

 

[JGT]

What type of spong is this, if it is some type of sponge at all, it’s been growing in my tank for a while now but I haven’t put much thought into it. Could anyone tell me something about it? It’s the red/purple organism.

Cyano or dinos, not sponge.