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Electroreception

The ability to detect weak electric fields in the environment. Sharks and rays carry jelly-filled pores called the ampullae of Lorenzini, sensitive enough to feel the current cast by a hidden prey animal's own muscles, letting them find a creature buried in sand they cannot see. But the sense has a hard physical limit: it works only in water, because seawater conducts electricity and air does not. In air, electric fields collapse almost instantly over distance - which is why no land animal hunts by electroreception. The physics simply forbids it.