ID please

[MV_ReEfLoVer]

Which species of caulerpa is this??also how am i suppose to prune it??
its growing at about 2-3 blades a day!

 

[graveyardworm]

Looks like C. Mexicana.

 

[mastou]

I would guess on C. taxifolia:
http://www.usc.edu/org/seagrant/caulerpa/SpeciesKey/feather.html

/Magnus