Green Stuff ON Rock?

[brrlong]

Ok, so on my live rock ive noticed in the last few days that it looks like someone took a green marker and colored in some of the spots??? What is this stuff on my rock? is it good/bad?? i tried to take a pic of it but it didnt come out clear.
The other day i lost an anneneme i think its because it wasnt getting proper lighting or possibly that i have a snail's in my tank and they where eating it? but it started to like disenagrate in my tank, pretty strange. But i didnt know if this was the cause of the green spots now?
any help?
Bryan

 

[elitephoto]

green spots are prolly coraline...its normal for rock to get this. I have anenomes in my tank as well as 15+ snails and a few crabs...none of which bother my anems. check your water quality/levels. also most anems like decent water flow and good lighting.