ID on this macro algae?

[RESONANCE]

Caulerpa racemosa var. peltata.

Very aggressive macro, take it out asap if you can. Even if you like macro algae, this type gives other macro algae a bad name. Grows fast and smothers other macro algae and corals. It can regrow from just a few cells stuck on rock.

[asylumdown]

That's good to know! I'll be flushing it promptly. I think I got all of it out, only one tiny little tendril had made it to a rock, so it all came out of the sand really easily.