Can anyone help me identify this?

[purplegorilla]

I want to say it is Caulerpa serrulata </em>since it is the closest I can see in resemblances (but the toothed margin doesn't extend all the way to the base). I have this macro growing in my sump for quiet a while. It is quiet hardy. Every 3-4 months I would trim it down. The size of the leaf is about 5 cm and 1-1.2 mm wide.

alt="" />

 

[spike]

I would have to agree,</em> caulerpa serrulata

 

[strapingyunglad]

I concer allso aswell to...