strange things on my skimmer

[rwana99]

I pulled my skimmer out to clean it, and found hundreds of worm/sponge like things growing on it. many of them look the same, with a sponge like body and a little "spikey" thing sticking out of them.
Can anyone help me identify these things?

http://reefcentral.com/gallery/data/500/127627c100_1070.jpg
http://reefcentral.com/gallery/data/500/127627c100_1067.jpg
http://reefcentral.com/gallery/data/500/127627c100_1060.jpg

[scrmbld33]

i get them too they are pineapple sponges (scypha) pic 1 http://melevsreef.com/id/scypha.html

[rwana99]

Thanks Scrmbld, I was a little worried seeing so many of them.
Its good to know they are harmless.