How sharks and rays use invisible electric fields to hunt hidden prey
In short: Sharks, rays, skates, and sawfish possess a remarkable biological superpower: the ability to detect weak electric signals emitted by other animals. This video explores the specialized anatomy that allows these creatures to hunt effectively, even when their prey is completely hidden from view.
Members of the group Elasmobranchii utilize specialized organs known as Ampullae of Lorenzini to navigate their environment. First identified by 17th-century Italian physician Stefano Lorenzini, these structures consist of tiny pores leading to jelly-filled canals that terminate in flask-like pockets. These organs are highly sensitive to the low-frequency electric fields generated by the natural biological processes of other organisms.
The phenomenon relies on osmoregulation, where the movement of ions across an animal's body surfaces creates a voltage difference against the surrounding seawater. Because these surfaces are 'leaky,' they emit a detectable electric signature. By sensing these subtle potential differences, elasmobranchs can pinpoint prey that would otherwise remain invisible, demonstrating a sophisticated sensory adaptation for survival in marine ecosystems.
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Sources
- Summary by Intellect · source: How Do Sharks and Rays Use Electricity to Find Hidden Prey? | Deep Look
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