Little Green Balls

[Fishmas]

I have a 5 month old tank and started it with dry marco rock.

The rock has covered with green algae and some coraline(I think) and is looking pretty good. I have recently noticed small olive green coloured balls sitting in the crevices of the rock and a few on the substrate. Most in the rock.
These are the size of tapioca pearl or smaller.

Any idea what these are . Are they ok

THanks

 

[GimpyFin]

Some pics would help, but just from the description it sounds maybe like bubble algae?

 

[Potatohead]

Probably... Emerald crab will eat them or you can scrape them off, just don't burst them.

 

[pyithar]

it's most likely bubble algae. a pic would be better to id.

 

[heathlindner25]

Probably... Emerald crab will eat them or you can scrape them off, just don't burst them.

Emeralds burst them .....

 

[pyithar]

http://www.reefkeeping.com/issues/2002-02/hcj/feature/

from that article^^:

"Much has been said about the danger of liberating spores when popping the vesicles of bubble algae. This is particularly true for members of Order Valoniaceae, but even then, the vesicles are said to be a sporulant risk only when having reached at least a third of their full size. Even if spores escape when you botch the job of vesicle-removal ('vesectomy', anyone?), those escapee spores have to run the gauntlet of herbivorous filter feeders, filtration equipment, and the wild lottery of hitting a good, unoccupied spot to settle and grow. Those spores will eventually be released anyway if you don't remove the vesicles."