id please if you can make out picture

[sweetstar64]

I don't know if you can make out the picture but I found this growing on the underside of some lr when moving rock around please excuse the algae haven't had time to scrap it off nursing school taking up alot of time these days.

 

[flricordia]

difficult to see but I would guess sponge. Common to find it growing int he dark areas of your tank

 

[sweetstar64]

thanks for the information