sponges

[norolo]

i was wondering if anybody has sponges growing from their rocks
i do i have pink yellow white and grey mostly yellow

 

[Devilishturtles]

Sponges are fairly common and abundant, especially in well established tanks. I bet almost every saltwater tank has a sponge in it somewhere, if not more than one.

 

[melosu58]

I agree with Lindsay. I have several colors in mine. You can see a big one in the background on this pic. The yellow sponge in the back.