Any One Know what this is

[Jayhawker]

I found this growing on the under side of one of my live rocks. It' looks like a bluish white fungus of some sort, anyone know what it might be and if its good or bad. This is what it looked like when I flipped it over. Thanks

 

[daugherty]

looks like some kind of sponge

 

[jcegt87]

that looks like one of my rock lol but yeah its a sopnge

it will grow behind most of you rock

i have colonies of itin my tank reef safe as far ias i know and great filter feeders (i think)

 

[Gooseman]

yeah its a sponge ... i have one growing on the side of my star polyps rock and nothing grows there

 

[yote]

Yep,Sponge,Reef safe,filter feeder,great natural filter.

 

[Bifferwine]

It's a sponge, no worries.