Help! Are this algae?

[richarddeweerd]

I need some help with identification, of some red stuff that grows on one of my softies.

I have some dark red stuff growing on my Clavularia (Green Clove Polyps). The picture was early in the morning but the polyps still open up. I have no idea what it is. I tried to suck it of the corals, but it is quite well attached.
It looks almost like a sponge.

My lab results came back and everything looks fine except a low phosphate, but I'm adding that now:

Kh = 9
No3 2.9 ppm
Phosphorus 1.5 ppm

All my other corals look fine.

I've had some time with very low to zero phosphate.

 

[MaxTremors]

Looks like a sponge to me.

 

[richarddeweerd]

Looks like a sponge to me.

Then it is not so bad

 

[monkeyCmonkeyDo]

Cyano or red velvet type algae. Looks thick. You should be able to turkey baster suck it out in 1 or 2 goes...if u can reach it. Itll stay together. go easy. Squirt in a container and dispose.
D

 

[monkeyCmonkeyDo]

Could be sponge too. If u zoom in u can see the holes in the sponge?
D