this post was submitted on 19 Apr 2025
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Microscopy

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Under the microscope today: aquatic mite (likely Hydrachnidia) and nematodes (phylum Nematoda) crawling through the algae from my guppy tank.

Video shot with my SW350T Compound Trinocular Microscope. Taken at 40X.

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[–] DonaldJMusk 1 points 5 days ago

Interesting note about the Nematodes seen in the sample: They represent 90% of all animals on the ocean floor. In total, 4.4 Γ— 1020 nematodes inhabit the Earth's topsoil, or approximately 60 billion for each human, with the highest densities observed in tundra and boreal forests. Their numerical dominance, often exceeding a million individuals per square meter and accounting for about 80% of all individual animals on Earth, their diversity of lifecycles, and their presence at various trophic levels point to an important role in many ecosystems.