I was analysing a water sample today when i came across this creature. I'm not sure if it is an insect larvae or other organism. The water sample was taken from where the beetlenut leaves were stored in a vessel. The water was'nt changed for two-three days. The organism was tiny, microscopic and almost had a transparent body.
Thanks in advance for replying and helping me identify this organism.

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That is almost certainly a rotifer. They are very common animals in ponds and streams. They are in a phylum all their own and are more closely related to things like flatworms than they are to insects.