Electric Eel: Key Facts & Natural History

Quick answer

The electric eel is a long, air-breathing fish of South American rivers that can generate powerful electric discharges to stun prey and defend itself. Despite its name, it is not a true eel but a type of knifefish, and it can grow up to 2.5 m (8 ft) long. Its strongest shocks can exceed 600 volts, and electric eels live around 15 years in the wild.

By Kaiser Khan , Founder Last reviewed July 10, 2026 How we research & review

Key takeaway

Overview

Biology

Electric Eel (Electrophorus electricus) is classified as Fish with conservation status Least Concern. Typical weight about 20 kg; lifespan around About 15 years in the wild.

Ecology

Diet: Carnivore. Habitat: Murky freshwater streams and pools. Movement and social systems reflect those pressures.

People and this species

Learn before you travel or keep related pets. Wild individuals are not toys; captive care needs species-specific husbandry.

Behavior and electricity

The electric eel produces electricity in three specialized organs that make up most of its long body, packed with thousands of cells that act like tiny batteries stacked together. It uses weak pulses to navigate and sense its surroundings in murky water and strong discharges, which can exceed 600 volts, to stun prey or deter attackers. Some have even been observed leaping from the water to press their discharge directly against a threat.

Diet and hunting

Electric eels are carnivores that feed on fish, amphibians, crustaceans, and small invertebrates, and young eels also eat insects. They hunt at night, using high-voltage shocks to immobilize prey before swallowing it whole. Their electric pulses can also force hidden prey to twitch, revealing its location.

Habitat and breathing

Electric eels live in murky, slow-moving freshwater of the Amazon and Orinoco basins in South America, including streams, swamps, and floodplain pools. Because these waters are often low in oxygen, the eel is an obligate air-breather that must rise to the surface regularly to gulp air. They prefer dark, sheltered places where they can ambush prey.

Interaction with humans

An electric eel's shock is rarely fatal to a healthy adult, but multiple discharges can be dangerous, and the jolt can cause people to fall and risk drowning in the water. Indigenous peoples and scientists have long been fascinated by the species, which helped inspire early research into electricity. They are kept in some public aquariums where their discharges can be demonstrated.

Research notes

Figures for electric eels (Electrophorus electricus) come from field studies, museum records, and conservation assessments that do not always agree on exact averages. Prefer ranges over single-point claims, and check whether a source describes wild, captive, or mixed populations.

Practical takeaways

If you encounter electric eels in the wild, prioritise distance and local guidance. If you care for related domestic or captive animals, match diet and housing to species needs rather than generic pet advice. Share accurate status information (Least Concern) when discussing conservation.

Sources

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