white things?

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Gomer4378

Aquarium Advice Activist
Joined
Feb 2, 2009
Messages
142
Location
Billings, MT
Ive got these white things growing on my corals, my zoas,star polyps, and frogspawn.
Can someone please tell me what these are and do I need to be worried?

Sorry, sec pic sucks but they are on the bottom left of the zoas.
 

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Ball and pineapple sponges harmless filter feeders will come and go as the food is available to them .. I have many and some are the weirdest colors they are a great hitchhiker .. In my one tank I use to have had them in the filter :D
 
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