Q-Tip Sponge?

I'm new to the salt water aquarium world. I have just started setting up a 20 gallon tank and so far all I really have is live rock. Today I noticed this little fuzzy guy hanging out under some rock that wasn't there yesterday. Can someone ID it? My best guess is what I have heard called "Q-Tip Sponge" Just trying to find out for sure what it is and if its a bad thing. Thanks in advance guys!

 

yosemite sam

Active Member
Hard to say for sure, can you get a closer photo? Here is a photo of a Q-tip sponge from the archive if you need a comparison:

Welcome to the board!
 

jackri

Active Member
No, they're just harmless filter feeders. My sumps are full of them but I don't have any im my main tank areas. Actually seems to grow (at least in my tanks) where there isn't any intense lighting.
 
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