plumbing invertebrate identification help

[Laser4me]

Hi,
recently our condo building built in 2004 with a basement garage, which has had some moisture seepage problems and some plumbing problems, recently after a drain line clean out, in nearby unit, This washed up in kitchen sink and wonder if anyone could speculate as to what it might be.

the other notable things are, this unit is on first floor, right next to driveway that has had Lichens, and algae growing on the surface through deteriorating cracks in slab. So wondering if maybe its a water table issue or there was previous septic on this property where the former large home that was here stood.

I understand identification of species is probably not possible but a general idea would be great.

[Mustafa]

Honestly, I can't even make out the shape of a possible organism on the pictures to even venture an educated guess. It all looks like debris. How does it move?

[Laser4me]

The bouton pic? The shape was pretty clear I thought. It lolled like headless shrimp I though it was some type of copepod maybe it's a larve of some type sorry I will try to sharpen and lighten photo