Need Help Identifying What This Is

[William Morris]

Doesn't appear to be hurting the corals and it's actually quite pretty.
Any help would be appreciated.

 

[Flippers4pups]

Doesn't appear to be hurting the corals and it's actually quite pretty.
Any help would be appreciated.

Hard to tell from the picture. Could be “red dragons breath”.

 

[William Morris]

I will try and get a better photo with the wife's iPhone.

 

[William Morris]

Updated photo

 

[lapin]

Possibly a species of gracilaria
https://www.live-plants.com/gracilaria.htm