Brown Macroalgae ID needed

[gmate]

This came from a fellow reefer's tank and takes a few weeks to grow. I pluck, it regrows. Not terribly invasive but I'd like to figure out what it is. My rabbitfish eats hair algae / bryopsis but won't touch this.

It will get air bubbles in the folds (is it a bubble algae) - it's extremely crisp (if you break it off out of water it feels like shredding romaine lettuce).

https://i.imgur.com/0mUDvhZ.jpg

https://i.imgur.com/L6BB8TF.jpg

 

[Michael Hoaster]

Never seen it! Being brown makes me think it could be related to Lobophora or Padina. It also bears some resemblance to Ulva, which has a lot of forms.

It looks cool and very exotic! When I can't ID a plant, I make up a name for it. What would you name it?

 

[Phycophila]

I know this is an old thread, but this is a Colpomenia sp.

 

[Michael Hoaster]

Thanks for the ID Phycophilia!