ID this new green plant like growth please

[2x2]

The first one has a green leaf like plant or algae growing out of the rock.
The 2nd has these strange round bulbs along a green like vine laying on the rock.

???? Anything Dangerous or to worry about?

 

[hotelbravo]

two types of caulerpa i believe, dangerous.. not really... evasive... yea
there are tons of different types of caulerpa some people warn of certain types releasing spores into the tank on rare occasion and hurting things in the tank but to be certain of which type it is you can try asking the folks in the marine plant/ macro algae section on this forum. or wait around here and hope someone with the knowledge pokes their head it to verify

 

[SoloGarth]

The one in the top photo is halimeda. I would remove both. Just my preference. I don't like algae of any type in my system.

 

[Rhygar666]

one is halimeda i have in my sump.

the other is caulerpa it grows slow but if you want to get rid of it and have the space and dont mint it carrying stuff around, get a Pincushion Urchin - Tripneustes Gratilla since i got one that caulerpa is gone

 

[billdogg]

As mentioned above - the first is Halimeda, IMO harmless, the 2nd is grape caulerpa - although not as bad as some of the species, it can spread fairly quickly and end up being difficult to remove. I would get rid of it while you can.

 

[cloak]

Here's a good article regarding the Halimeda.

http://reefkeeping.com/issues/2004-04/nftt/index.php

 

[e048]

How big is the tank? Get a tang to eat it

 

[SoloGarth]

I had halimeda and a large yellow tang. It never touched it.