Help ID what is growing on my zoas

[Relaxation Studio]

This burgundy plant-looking item popped up on my zoas in my Nanocube 32 and is getting pretty big now - close to 2 inches in diameter. What is it and is it okay to keep where he is? Or should it be removed? Thank you for your help.

 

[Relaxation Studio]

Bump

 

[KJ]

red algae - - Image Search Results

images.search.yahoo.com

 

[Relaxation Studio]

Thanks for that info. Should I pull it out or leave it?

 

[Softhammer]

Keep it.