Lol! Yeah. Blue photosynthetic sponge, (Collospongia sp.) would be my guess. Hey, come up with a cool name and you can sell frags for an obscene amount of money :-D

Did you say blue photosynthetic? Aren't these found at lower depths?
I can't think of a fancy pants name but if I do hopefully it will hockey stick.

Note that the blue sponge needs high light.

+1 needs LOTS of light, fairly common on this side of the woods.

Thanks guys for the info. I was just bedazzled by the colour.

Hey Chris, just remember to add "ultra" at the front of whatever name you give your sponge frags...that's where the $$$$ at yo!!!

I think i've seen the green variety of that sponge, more like emerald green. That intense blue is very rare, first time i've seen it.