what the heck is this???

[Southern Fishing Co.]

i woke up this morning and my tank looked good and everything was fine. i went fishing out on the lake for about 7 hours and when i got back home i found these in my overflow. and thats the only place they are, ive looked thoughout the rest of the tank and my sump and didn'

t find them anywhere else.

 

[metzer]

pineapple sponges, they live in my sump and no problems.

 

[Biglew11]

Yep pineapple sponges, filter feeders, good to have. Like dark places.