Help with ID Please

[ErehwoN]

Mystery Algae/Plant

Video shows a powerhead between two filter socks. Some live rock is between the powerhead and the top sock. There is a long string of chaeto hanging from the pump. But what's the leafy stuff on the live rock?

Any help appreciated.

Thanks,

Jim

 

[lapin]

Looks like Ulva (sea lettace)
2 types
One grows on rock the other floats on surface

 

[Goaway]

+1 on Ulva

 

[ErehwoN]

Thanks!

Jim