Red fern like algae

[lauremf2002]

There is this red algae on my rock that grows in perfect "feather" like branches. Its very soft and actually quite pretty in the current. It doesnt seem to be invasive so have left it alone. does anyone know what it is?
Sorry my camers isnt very good

 

[paulyd1978]

No, but I've got it! Never really bothered me enough to ask anyone: