Electric Eel

Electric Eel facts at a glance

How big is a electric eel?

An adult electric eel measures 2.5 m long — about 1.4× the height of an average adult person (1.73 m) — and weighs around 20 kg, about 29% of an average adult’s body weight (70 kg).

What is a baby electric eel called?

Explore more animal collective nouns and baby animal names .

Not a true eel

Despite its name, the electric eel is not a true eel at all but a type of knifefish, more closely related to catfish and carp than to the eels of the sea. It gets its name from its long, cylindrical, eel-like body, which can reach 2.5 m in length. It swims slowly by rippling a long fin that runs along the underside of its body. This undulating motion lets it move forward or backward with equal ease through cluttered water.

How it generates electricity

Most of the electric eel's body is packed with specialised cells called electrocytes, stacked like the cells in a battery. When the eel discharges, thousands of these cells fire at once, producing a jolt strong enough to stun prey or deter a predator. It also emits weaker pulses used for navigation and to sense its surroundings in murky water. This makes electricity central to both hunting and communication.

Hunting and diet

The electric eel is a carnivore that preys on fish, amphibians, and invertebrates. It hunts by releasing high-voltage discharges that stun or immobilise nearby prey, then swallows the helpless animal whole. Weak electric pulses help it locate targets it cannot see in cloudy, sediment-filled water. Because its eyesight is poor, it depends heavily on its electrical sense to find food.

Breathing air

Electric eels live in oxygen-poor waters and cannot rely on their gills alone, so they gulp air at the surface using a specialised, blood-rich lining in the mouth. They must surface every few minutes to breathe, and would drown if unable to reach the surface. This adaptation lets them survive in stagnant, muddy pools where many other fish could not. It also means they spend much of their life near the surface.

Habitat and range

Electric eels are found in the murky freshwater streams, pools, and floodplains of northern South America, including the Amazon and Orinoco basins. They prefer slow-moving, muddy water with plenty of cover. This dim, sediment-rich environment suits an animal that hunts by electricity rather than sight. They spend most of their time near the bottom, rising only to breathe.

Life and conservation

Electric eels live about 15 years in the wild. During the dry season, a male builds a nest of saliva into which the female lays her eggs, and he guards the developing young. The species is widespread across its range and is listed as Least Concern by the IUCN. Its remote, murky habitat has helped keep populations stable.

Did you know? Electric Eel facts

• 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.
• An electric eel can generate strong discharges that exceed 600 volts, enough to stun prey or deter a large attacker, using specialized electric organs along its body.
• No. Despite its name and shape, the electric eel is not a true eel but a type of knifefish, more closely related to catfish and carp.
• Electric eels are carnivores that eat fish, amphibians, crustaceans, and invertebrates, often using electric shocks to stun prey before swallowing it whole.
• A single shock is rarely fatal to a healthy adult, but repeated discharges can be dangerous and may cause a person to fall or be unable to swim, risking drowning.
• Conservation: Least Concern (IUCN).

Diet & feeding

Electric Eel feeds primarily as a carnivore. 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

Adaptations

• 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.
• 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.

Behaviour & ecology

• 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.
• 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.
• 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.

Communication

• Lateral-line and visual cues coordinate schooling, courtship, or territorial behaviour.
• Some species produce low-frequency sounds or drumming for spawning or defence.

Habitat & range

Murky freshwater streams and pools

Ecological role

Electric Eel acts as a predator that helps regulate prey populations and maintain balance in murky freshwater streams and pools.

Conservation status of the Electric Eel

Sources & references

This guide is compiled and reviewed against established zoological and conservation references. Key sources for the Electric Eel:

• IUCN Red List of Threatened Species

  Conservation status (Least Concern) reflects the IUCN Red List category for Electrophorus electricus.

• iNaturalist — observations & photos

  Search citizen-science observations and community IDs for Electrophorus electricus. Useful for range checks and recent sightings — not a substitute for formal Red List status.

• GBIF — occurrence data

  Global Biodiversity Information Facility species search for Electrophorus electricus. Explore published occurrence records used in range research.

• IUCN Red List — Electrophorus electricus.

  Conservation status (Least Concern) and population trends.

• Animal Diversity Web — Electrophorus electricus. University of Michigan Museum of Zoology.

  Life history, morphology, and range.

• Wikipedia — Electric Eel.

  General taxonomy and overview (cross-check primary sources).

• Global Animal Guide editorial standards

  How we research, source, review, and update every guide for accuracy.