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I have just discovered that my kitchen sink pipe has been leaking for quite some time (possibly months) which has resulted in water and food deposits collecting in my cupboard.

I smeared some of the residue onto a slide and looked at it under my microscope. I could see a large number of translucent organisms (visible at 40x magnification, they are roughly 100 µm in length). They all appeared to be of the same species although they varied in size and developmental stage. The 'adults' are quite long and look similar to maggots; they scrunch their bodies into balls and then stretch out in order to propel themselves.

Unfortunately I lack the equipment to take a photo of it but here's a rough sketch of what it looks like moving to the right:

enter image description here

Don't take the features too literally.

Can anyone hazard a guess as to what it might be?

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Can you make an image of this organisms? –  Chris Aug 10 at 21:18
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@Chris I have updated my question. –  lemon Aug 10 at 21:45
    
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I cannot help to answer your question, but I admire your action of taking swabs instead of freaking out after discovering this fact. –  skymninge Aug 11 at 13:54

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It seems like Euglena but I need more parameters than what you have provided.

https://www.youtube.com/watch?v=ZHZZKwrYm4g

you can narrow it down by this:

Or

You can find them in commonly found microorganism in kitchen:

http://www.colorado.edu/eeb/EEBprojects/FiererLab/Flores_etal_2012_kitchens.pdf

Or

Source: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0078866

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Euglena are certainly very similar! Although they don't scrunch up and move like those that I observed. I will look through this list when I get some spare time, thank you. –  lemon Aug 11 at 13:25

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