I bought a small blue sponge a few months ago
IMG_2033
it was a broken frag from a larger colony. I didn't have a lot of experience with sponges so just wanted to see how this one would work out.
Just today I noticed that there is some propagation and tiny patches of blue sponges growing in different parts of the tank.
Spongepropjpg
The crud on it is from the maintenance I was doing (disturbing the substrate). This patch is about 2 feet from the original colony. Will be keeping an eye on this to see - didn't realize sponges propagated this way.

it was a broken frag from a larger colony. I didn't have a lot of experience with sponges so just wanted to see how this one would work out.
Just today I noticed that there is some propagation and tiny patches of blue sponges growing in different parts of the tank.

The crud on it is from the maintenance I was doing (disturbing the substrate). This patch is about 2 feet from the original colony. Will be keeping an eye on this to see - didn't realize sponges propagated this way.