Algae ID

[Alex DeBeer]

Posting this for my cousin.
it’s in his tank but not sure what it is.
can you help?

 

[vetteguy53081]

Looks like caulerpa and is fast growing. Tangs eat it like salad
You can pull by hand and place in sump as it will reduce nitrate

 

[Manny D. Mandarin]

Hi there! That looks like it might be Caulerpa Serrulata