Are hydroids jellyfish harmful?

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danielmanlee

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Apr 24, 2007
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Hello everyone... My new 72 gal tank is moving along very well.. but recently I have some dotlike bug with legs hanging on the glass.. I did some research and looks like they are call Hydroids jellyfish... Are this Bugs very common in a newly establish tank? are they harmful and get out of control? Is there any action I need to take before it gets out of hand? any experience advise will be greatly appreciated...
 

rockethippo

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Feb 28, 2007
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Yukon Territory, Canada
LOL! Make them sad:Angel:
 
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