i have this spongy looking stuff growing on one of my live rock pieces, its basically yellow spongy and has little tubes growing out of it can any one identify

i think you just did. sounds like you got some good rock. becarefull you dont expose rock to air . the sponge will die . mabie harmfull to tank inhabitants

i got this great LFS guy that basically like to throw some of his live rock that he has had for years in his for sale stuff so i like to dip in to it as much as possible