Algae ID in sump

[chipchipbro]

hey guys

a friend of mine has somd werid algae growth in his sump.
Does anyone know what kind of algae this is?

thanks a lot for your help!

 

[ISpeakForTheSeas]

Any chance of pics with some brighter white light?

If not, those look like they may be feather duster worm tubes to me.