Probably my last question but... what the heck is this?

[hts0007]

These blobs just showed up in my tank. They almost look like egg sacs for something but i have no clue what.

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[54seaweed]

sponge is what it looks to me

 

[Marty.h]

As above a sponge a harmless filter feeder.

The only sponge that can be a menace is chicken liver sponge and it's not what you have there

 

[hts0007]

Thank you !

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