I have little spines growing on my rock


New Member
They are only 1/4 to 1/2 inch long and growing out of the rocks. My tank is almost a year old and has 3 fish in it. Last nite when i scrubbed the inner glass, all the little spines appearred to have a trail of goo hanging from them, what could these things be?? They seem to be all over the place. My rock is all normal rock and I put in 1 piece of live rock to hopefully seed the tank, that was probably 9 or 10 months ago. I was hoping over time the rest would slowly become live.