The green sea turtle has migratory habits and performs transoceanic migrations of up to 1242mi (2000km) to reach its nesting site. To orient itself, it uses its perception of the magnetic field and currents. In adulthood, it has a magnetic map of its marine environment which allows it to perceive the variations of the geomagnetic inclination and the intensity of the magnetic field of its migratory route as well as the combination of these two components at every point of its journey.