Green fan-like algae, I have never seen before

[Heibel]

Anyone know what this stuff is called? It spreads pretty well and is hard to get rid of. It is in my 33 gallon tank so I haven't put a Tang in there to see if it will eat it or not. Want to try to get an id before I do so, I will be needing to dip my zoa frags in peroxide I believe to get rid of it, but it is also on my large pieces of rock, so need to figure out a way to deal with it. Any help would be awesome, thanks very much

 

[Highgrade]

Bryopsis most likely. Check out the Fluconazole thread for advice.

 

[Heibel]

If it is Bryopsis, it is unlike any I have ever seen before. All Bryopsis I have seen is stringy and long, this is trianglar fan shaped.

 

[Highgrade]

If it is Bryopsis, it is unlike any I have ever seen before. All Bryopsis I have seen is stringy and long, this is trianglar fan shaped.

Calurpa maybe?

 

[Annette Garcia]

Anyone know what this stuff is called? It spreads pretty well and is hard to get rid of. It is in my 33 gallon tank so I haven't put a Tang in there to see if it will eat it or not. Want to try to get an id before I do so, I will be needing to dip my zoa frags in peroxide I believe to get rid of it, but it is also on my large pieces of rock, so need to figure out a way to deal with it. Any help would be awesome, thanks very much

It looks like sea lettuce to me.