电鳗 · Electric Eel

Overview

A large nocturnal predator, Electrophorus electricus is a knifefish rather than a true eel. Its powerful electrical discharge can incapacitate a person. Care requires specialist facilities, and apparent tameness does not make direct contact safe.

Distribution & habitat

Records include Venezuela, Guyana, Suriname, French Guiana, Peru, and Brazil. Typical habitats are slow or stagnant, often oxygen-poor waters such as vegetated creeks, swamps, and tributaries.

Aquarium setup

Even a single fish needs enormous housing, with upgrades as it grows. Keep movement minimal and lighting very dim, using roots, branches, or smooth rocks for refuge. Sand or mud is useful but not essential.

The lid must resist displacement and leave no escape gaps. Maintain roughly 15 cm of air space above the water and unobstructed access to the surface: this obligate air breather cannot survive on its gills alone. A very large, efficient filter must also handle the waste load.

Diet & feeding

It is carnivorous, taking fish, invertebrates, and amphibians naturally, and usually converts readily to dead food. Appropriate worms and fish are options, with shrimp or mussels also accepted by juveniles. Feeding belongs within specialist management, not direct hand-feeding trials.

Behaviour & compatibility

Keep one fish alone. Other species are unsuitable because it can kill fish even larger than itself. Groups of three or more may be possible, but their housing requirements are generally beyond private hobby facilities.

Breeding

Accounts suggest that a male makes a saliva-based nest for the eggs. Captive breeding is unrecorded, and the description should not be treated as an established bubble-nest procedure.

Notes

Weak electrical signals support navigation, prey detection, and communication; strong discharges serve hunting and defense and can be life-threatening. Poor vision does not imply poor awareness. Oxygen uptake through vascular tissue in the mouth makes access to atmospheric air indispensable.