A tardigrade (water bear). False-colored adult (blue: digestive tract with food inside appearing black, orange: gonad with three growing oocytes marked with asterisks). Refractile cells filling the body cavity are coelomocytes. Nomarski optics. tardigrades.bio.unc.edu/  Taxonomy: Kingdom Metazoa/Phylum Tardigrada/Class Eutardigrada/Order Parachela/Family Hypsibiidae/Genus Hypsibius/Species dujardini