Clear sponges growing on LR?

[Jason Brown]

Hi all,

I started a 20g SW to get my feet wet about 6 weeks ago - I love lurking this place, but time to make a post!

Can anyone help me ID these? I noticed them about 1-2 weeks in, but growth seems to be taking off in the last 1-2 weeks, now about max 0.5-1 cm. I think they may be clear sponges? Should I try and get rid of some of them on my water change today? This is on "real reef rock" that my LFS had ready to go and I don't seem to see much more of it other than on this small piece of rock.

Thanks!

 

[Diesel]

Well, I'm going to give you your first like
What you see are sponges and these are keepers as long as they last.
A typical appearance in a new tank but soon they will decline as your tank matures.
You will see them appear under and in nooks of your rock as they don't like bright light.
That said don't remove them, they are filter feeders.

 

[Jason Brown]

Thanks! I duplicate posted this somehow and got the same response in another thread. I knew I could find an answer here