magnetosensitivity

biology

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July 19, 2026

Quick Summary

Magnetosensitivity refers to an organism's ability to sense the Earth's magnetic field. This biological capability allows certain animals to use magnetic fields for orientation and navigation.12

For example, magnetotactic bacteria contain tiny crystals of magnetite or greigite, which align along the cell's axis and help them orient themselves within the Earth's magnetic field. This orientation aids them in reaching oxygen-depleted sediments necessary for their survival.1

While the exact mechanisms and prevalence of magnetosensitivity in all animals are still under investigation, it is known to play a role in the migration of birds and fish. Theories also explore its potential involvement in mass strandings of cetaceans.2

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life
Photosensitivity, audiosensitivity, thermosensitivity, chemosensitivity, and magnetosensitivity
Magnetotactic bacteria sense Earth’s magnetic field. North Pole-seeking bacteria swim toward the sediment-water interface as they follow the magnetic lines of force. South Pole-seeking flagellated magnetotactic bacteria do the same in the Southern Hemisphere. Since those studied are microaerophiles—i.e., they require oxygen in lower than…
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Magnetotactic bacteria sense Earth’s magnetic field. North Pole-seeking bacteria swim toward the sediment-water interface as they follow the magnetic lines of force. South Pole-seeking flagellated magnetotactic bacteria do the same in the Southern Hemisphere. Since those studied are microaerophiles—i.e., they require oxygen in lower than…
Read More