Pink slime stuff on rock

[Danh Ngo]

I found this think today, some kind of pink stuff, look a bit clear, on my rock what is this?
It does not look as red as cyano

 

[Crabs McJones]

Hard to tell. Could be sponges. Any chance at a clearer picture?

 

[Danh Ngo]

The round pink stuff in the center of the pic

 

[Crabs McJones]

The round pink stuff in the center of the pic

Sponge. Perfectly harmless filter feeder

 

[Danh Ngo]

Here is a closer pic

 

[Danh Ngo]

The round pink stuff in the center of the pic

Thank you

 

[SAPPER]

I have sponge like that and find them ok, but not all sponges are good. I am having an outbreak of a black sponge at the minute. It looks different to chicken liver sponge but is growing fast and covering the base of one of my towers. Another sponge I have had a problem with is white Clathrina, it had a growth spurt and covered some zoas. The Clathrina was easily pulled off though. Never had an issue with yellow Clathrina just the white one.