Yellow algae?

[Karlos69]

Can anyone identify this algae starting to spread to all my live rock its flourescent yellow.

 

[Karlos69]

Nobody ? Could this be cyano?

 

[joy13]

Looks like a sponge of some type to me. Cyano is usually red or a brownish red,

 

[melosu58]

I `ve got some yellow sponges in my tank.

 

[Karlos69]

Its almost like it stains the live rocks do sponges spread pretty quickly?

 

[joy13]

They can. Myself when I try to identify something I usually poke it. See how it responds and what type of texture it is. I know sounds strange when I ask have you poked it.