Electric Eel (Electrophorus electricus)

FishFreshwaterElectric

Overview

The electric eel (Electrophorus electricus) is a famous fish of South American rivers, capable of producing powerful electric shocks. Despite the name, it is not a true eel at all — it is a kind of knifefish, more closely related to catfish and carp, with a long, rounded, eel-like body. Most of that body is taken up by special organs packed with thousands of modified muscle cells (electrocytes) that work like tiny batteries wired in series.

Electric eels use electricity in remarkable ways: strong jolts to stun prey and deter threats, and weaker pulses to sense their surroundings and communicate in murky water.

Note: a few electric eel species are now recognised; details here use Electrophorus electricus broadly. Treat general statements as approximate and verify against authoritative sources.

Habitat & Range

Electric eels live in the fresh waters of northern South America, especially the Amazon and Orinoco basins — in slow rivers, streams, swamps, floodplains, and murky, oxygen-poor pools. They are air-breathers, gulping air at the surface, which lets them survive in the still, low-oxygen waters they favour.

Diet

Electric eels are carnivores that prey on fish, along with invertebrates, amphibians, and small animals. They hunt largely by electricity: a hunting eel emits high-voltage pulses that can trigger the muscles of nearby prey — making hidden fish twitch and reveal themselves, or briefly paralysing them — before the eel swallows the stunned victim. Young eels start on small invertebrates.

Behavior

The electric eel's electric organs run most of its body length. Weak, constant pulses act like a radar system (electrolocation) and as signals to other eels in dark water, while strong discharges — which can reach several hundred volts — are used to stun prey and in defence. Remarkably, hunting eels can curl their bodies to concentrate the shock, and some have been observed leaping partly out of the water to deliver a shock directly to a threat. They breathe air and are surprisingly attentive parents in some respects, with males guarding nests of eggs.

Human Interaction & Conservation

Electric eels have fascinated scientists for centuries and even helped inspire early research into electricity and the design of batteries. Their shocks are rarely fatal to a healthy adult human but are genuinely dangerous — repeated jolts can cause injury, and the real risk is being stunned and drowning in water. They should never be handled. Most populations are not currently of major conservation concern. Consult authoritative sources for details.

More photos of the electric eel