The classification of Mite species is not an easy task, and for our purposes here, it is sufficient to identify this creature as a "Water Mite" and leave it at that. The Mite shown here, devoid of any leg hairs, is unable to swim fast, so its life is spent creeping slowly along the pond bottom muck - a bottom feeder in the true sense, and therefore easy to photograph. If they're not covered in muck, that is, which is how they spend their entire existence.