Algae ID please

[mwgilliand]

 

[Dancingmad]

Just a guess - Caulerpa Serrulata or some variation thereof.

 

[LetItReef]

Don't know the name but had a small of this algae wrapped on a red dragon breath and grows fast. Had to remove it since it did attach on the glass and rocks- grows like a fern.

 

[CastAway]

Caulerpa brachypus

I keep it in my fuge. Excellent nutrient export species. But, don't let it into your display. You'll never get it off your rock once it roots in.