Am I right about what this is?

[The Guy]

http://www.wetwebmedia.com/ca/volume...acemosa_WA.jpg
I'm pretty sure it's Caulerpa Racemosa or commonly called grapeweed, I have it growing in my refugium along with cheato and loaded with 1000's of copods and amphipods, so I have a very well fed Scooter blenny in my 33 gallon tank.
It grows like wild fire and mixes into the cheato, but does not seem to hamper growth of either.