Two hexagonal vasculocytes, each measuring 2.7 microns in diameter, float in a clear suspension fluid. The two nanorobots are linked via docking ports in their adjacent metamorphic bumpers. Expansion or contraction of the bumpers allows the docked pair to vary their separation distance and thus to stationkeep over a periodically-stretching tissue surface such as an arterial vessel wall. Numerous mechanical legs providing locomotion, surface sensing, and other manipulation capabilities are visible beneath both units.