whats this?

[reefer_head]

I bought a piece rock and discovered the feather dusters, but don't know what the little bump dee-le-o's are. They were small and now appear to be growing. Think it might be some type of coral, but not sure. :question:

 

[jhnrb]

coral or sponge, etc. cant tell by pics. just watch um and have fun. congrats on the score.