The 168th known tardigrade—a.k.a "water bear" or "moss piglet"—species can even reproduce in the lab.

Macrobiotus shonaicus sp. nov.–egg chorion morphology seen in SEM. A–B–entire eggs with clearly visible flexible filaments on the egg processes; C–D–processes with filaments of various lengths and the surface between processes; Credit: http://bit.ly/2oLzJ