idea what this is?

[slm222]

Ive found these in my overflow and cant tell what they are. when I squish them they are kind of like a sponge. the tail(?) is connected to the glass and it looks like the mouth(?) is free floating in the water.

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[polarbear]

pineapple sponges. I have a lot of them also. They are a good thing

[slm222]

ok cool. cause I was getting worried it was some type of worm.