What are these creature in my tank?

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All I can see is the underwater video in post #9 where the worms are not appearing to move at all like segmented worms, in fact I'm only seeing them "glide" as shown above, slightly scrunching when changing directions. Idk who's saying that they are strictly limited to ciliary locomotion though, but they are wrong. They are absolutely capable of locomotion through muscular contractions aka stretch and scrunch, as well as a combination of both.

The distinction is that leeches do not glide.
 
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That close-up that you showed, Backfromthedead Backfromthedead , was the one individual that had me really unsure at first. Then when looking at a couple of others, that arrowhead-shape and a set of eyes almost sorta kinda seemed to be there...but the inchworm-type motion clinched it for me. I've never seen planaria do anything other than the smooth glide.

But now I see that underwater video and there does seem to be some gliding going on there, which says no to leeches. The original video is gone now?

If they're planaria...well, those are big-ass planaria! I've never seen them approach that size, but I'm sure they get bigger than the ones I've seen.

I'm still leaning towards leeches, but...I really do think we need to wait for the taste test. :)
 
That close-up that you showed, Backfromthedead Backfromthedead , was the one individual that had me really unsure at first. Then when looking at a couple of others, that arrowhead-shape and a set of eyes almost sorta kinda seemed to be there...but the inchworm-type motion clinched it for me. I've never seen planaria do anything other than the smooth glide.

But now I see that underwater video and there does seem to be some gliding going on there, which says no to leeches. The original video is gone now?

If they're planaria...well, those are big-ass planaria! I've never seen them approach that size, but I'm sure they get bigger than the ones I've seen.

I'm still leaning towards leeches, but...I really do think we need to wait for the taste test. :)

Really just need a closeup in clear resolution to confirm if there are any segments or not.

And yeah, taste test would lay this to rest quickly. I'm only so certain here cause I'm allergic to planaria and have to know the difference.
 
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