What are these?

[crimper]

I noticed a bunch of white organisms attached to my rock, they look like tiny white pineapples, however my fishes aren't interested on chomping them :lol:

Can anyone identify these please.

http://i403.photobucket.com/albums/pp113/arxen/IMG_2828_zpsf1dbb164.jpg

magnified

http://i403.photobucket.com/albums/pp113/arxen/ae5733c5-15d1-4e29-a240-90c9be4df29b_zps7ae59268.jpg

Thanks for looking and appreciate your inputs.

[JDigital]

Pineapple Sponges by the looks of most of them... Good to have IMO.

[FishyFishy!]

Those are sponges, as JDigital said, commonly called the pineapple sponges. Good filter feeders. That hair algae on the other hand...

[crimper]

Thanks for your replies. Good to hear that they are good creatures lol

[tlhood]

They be pineapples... under the sea....:lol:

[kien]

SpongeBob Square Pants houses.