We demonstrate Janus micro motor in fluid. The motor consists of magnesium  (Mg) particles deposited gold (Au) on the outmost surface. The Janus particle  exhibits a directional motion due to the exposed Mg region which generates  hydrogen gas in chloride-rich solutions (e.g. seawater) in a long term  manner. We manipulate such particles in a way that two particles are  connected using linear DNA structures. Through motile observation of the  dumbbell-like objects, we identify the force and directional motion of two-  particle ensembles.