Please Not What I think it is...

[tdileo]

I have had this stuff in a crag in my rock the past few weeks. I kinda assumed it was filter floss that got stuck but today I noticed an explosion in growth and that it is green. Any experts who can tell me if this is *shiver* Bryopsis?

 

[Jason mack]

Could be turf algae ! The green ball things are bubble algae !

 

[saltyfilmfolks]

I can't make out enough detail to tell what it is.
Like lots of little feathers? Each leaf is a feather.

 

[ncaldwell]

If I had to guess id say bryopsis

 

[DeniseAndy]

If the leaf like structures look like ferns and are actually quite pretty, it is briopsis.