What is this algae? (It is not Bryopsis)

[OrionN]

I posted this on the algae forum but will also post here for more exposure.

This is an algae in my tank. Initially I though that this is Bryopsis too but my fat tangs eat them like there is no tomorrow. I only have this in the sump and in place the tangs cannot reach. Great food for them. I was very curious so I took closer pictures. Anybody can ID these for me. they attach at one point and then branching up. I removed one and take picture close up and on white paper for better ID. Pictures below.
I don't think this algae is Bryopsis, because they do not look like Bryopsis close up, and they are such good food for my tangs and angels.

This is Bryopsis, with the feathery appearance.

 

[Instigate]

I posted this on the algae forum but will also post here for more exposure.

This is an algae in my tank. Initially I though that this is Bryopsis too but my fat tangs eat them like there is no tomorrow. I only have this in the sump and in place the tangs cannot reach. Great food for them. I was very curious so I took closer pictures. Anybody can ID these for me. they attach at one point and then branching up. I removed one and take picture close up and on white paper for better ID. Pictures below.
I don't think this algae is Bryopsis, because they do not look like Bryopsis close up, and they are such good food for my tangs and angels.

This is Bryopsis, with the feathery appearance.

For the record there are many types of bryopsis, not just the type shown. The type I had looked a lot of GHA with the naked eye but under a microscope you could make out the fern structure, but I agree what you have there doesn't look like bryopsis.