Strange thing on glass.
- Thread starter FDchase
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That’s a sponge - harmless filter feeder.
jabberwock
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My initial thought was sponge.
TnFishwater98
Drink more fishwater there! And I still want more!
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Crazy looking sponge ! 
TnFishwater98
Drink more fishwater there! And I still want more!
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I’d just leave it. It’s a filter feeder and it’s not bothering anything. Just trim it as it gets bigger so it doesn’t become a flow issue. Pods and other organisms will use it as a shelter. What the heck? Give it a name!
jabberwock
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Name it "Squishy"
