Please Identify

[cool clown]

I have these things groing all over my sump. What are they? Good or bad. This is the best pic I could get.

 

[floatingfish]

if your speaking of the large object i think they resemble q-tip sponges. i have a couple in my tank. i dont think they are anything to worry about.

 

[big911dog]

q-tip sponges. not harmful at all