**3.9 Magnetotaxis**

Magnetotaxis is the movement due to magnetic field. This type of movement is a character of diverse group of gram-negative bacteria that perform their orientation and coordination movements according to earth's magnetic field [19]. They are majorly aquatic and swim along the geomagnetic field lines. These types of bacteria are also termed as magnetotactic bacteria [20]. Supramolecular adaptive nanomoters have been developed that exhibit magnetotactic behavior and their guided motion is observed in the tissue model [21].
