Is this some kind of agrae?

[offerico]

Hi,
In my tank these red bubbles started growing.

Can anyone identify them please?

 

[pga7602]

If you touch and squeeze it and it has firmness, I would guess it's a form of macro algae. If it's slimy and has no firmness, then it could be trapped bubbles inside cyano. From the looks of the pic, I would say it's more of a macro algae.

 

[saltyfilmfolks]

Red bubble algae. Take that guy out of the tank to remove that stuff. Reports are it's worse than green.