Can someone help me identify two things that are growing in my aquarium?
The first thing is a set of long, string, pinkish-white branches that are growing out of a zooanthid rock.
The second thing is a green, algae-like substance covering a coral. I don't know what kind of coral it is, either. The substance seems to be disturbing the underlying polyps.
What are they and do I need to remove them?
The first thing is a set of long, string, pinkish-white branches that are growing out of a zooanthid rock.

The second thing is a green, algae-like substance covering a coral. I don't know what kind of coral it is, either. The substance seems to be disturbing the underlying polyps.

What are they and do I need to remove them?