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Old 12-30-2015, 05:48 PM   #1
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Yellow rock encrusting sponge

just curious, how common or uncommon are they, I have had them for years and are slowly spreading
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Old 12-30-2015, 05:59 PM   #2
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Yellow rock encrusting sponge

They are generally called pineapple sponges for obvious reasons. They are common. They vary from white to yellow and even orange. In rare cases they can get out of control but are easy to kill if necessary. They are usually a good sign that your reef is doing well. I believe they are filter feeders and not photosynthetic.

If it's a true encrusting yellow sponge, then that's a really good thing if you like sponges.


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Old 12-31-2015, 09:35 AM   #3
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They are all over my tank. You can see the one under the starfish. They are very common and great for the tank. Great filter feeders.
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Old 01-03-2016, 08:50 AM   #4
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I have them covering whole rock pieces
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