Magnetotaxis describes an ability to sense a magnetic field and coordinate movement in response. In 1975, R.P. Blakemore appeared to have observed the phenomena observing the behaviour of certain motile aquatic bacteria. However, these bacteria orient to the Earth`s magnetic field even after death, without biologically sensing the field. They are....
The ability of some organisms, notably magnetotactic bacteria, to sense and respond to a magnetic field.
Tactic response to magnetic field, in magnetotactic bacteria the Earth's magnetic field is used as a guide to up and down in deep sediment. ... (18 Nov 1997) ... 
Tactic response to magnetic field; in magnetotactic bacteria the Earth's magnetic field is used as a guide to 'up' and 'down' in deep sediment.
magnetotaxis The orientation or movement of a motile organism in response to a magnetic field.
directional movement of bacterial cells using flagella in response to a magnetic field