View Full Version : Weird stuff growing, help ID (pics)

12/13/2007, 01:06 PM
My brother has some weird algae type stuff growing on the back of one of his rocks. It's in a 125g reef. It literally took over this one backside of the rock. I am guessing it doesn't like a lot of light. He has a T5 over it now and it seems to be fragging off. Here are some pics of it, please help ID what it is, good or bad, thank you!


12/13/2007, 01:11 PM
the pictures are hard to tell but if it doesn't look like hair algae I would venture to guess its some sort of colonial sponge. Again, kinda hard from the pic but it doesn't look like any of the nuisance algaes.

12/13/2007, 01:28 PM

12/13/2007, 01:58 PM
I have these growing all over in my sump. They're sponges. Nothing to worry about.

12/13/2007, 05:12 PM
Cool, thanks everyone. I'll let my brother know, wish his regal angel would eat them, he's having trouble getting it to take prepared foods, or anything really, going on for over 5 weeks now! Glad it isn't a bad thing, thanks.