Beatrice Lang
Electric eels are not actually eels at all. They are neotropical freshwater fish from South America in the family Gymnotidae. They are known for their ability to stun their prey by generating electricity, delivering shocks of up to 860 volts. They are found in the muddy waters of the Amazon and Orinoco river basins, as well as in upland waters. Electric eels are air-breathers, meaning they need to surface about every ten minutes to breathe. So, despite their name, electric eels do not live in the ocean.
| Characteristics | Values |
|---|---|
| Habitat | Electric eels are found in freshwaters in South America |
| Habitat type | Murky pools, calm stretches of middle and lower Amazon and Orinoco river basins, upland waters, lowland waters, streams, grassland, ravines, ponds, swamps, muddy waters |
| Habitat salinity | Low salt content |
| Habitat temperature | N/A |
| Water oxygen levels | Low |
| Water flow | Fast-flowing rivers |
| Water depth | N/A |
| Water pH | N/A |
| Diet | Fish, amphibians, crustaceans, crabs, freshwater shrimp |
| Feeding behaviour | Electric eels stun their prey by generating electricity |
| Prey | N/A |
| Predators | N/A |
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What You'll Learn
Electric eels are freshwater fish, not saltwater
Electric eels, despite their name, are not true eels. They are neotropical freshwater fish from the family Gymnotidae, which also includes knife fish. They are found in the muddy waters of the Amazon and Orinoco river basins in South America, as well as in upland waters and lowland regions with streams, grassland, ravines, and ponds.
Electric eels are obligate air-breathing animals, which means they need to surface frequently to breathe. They are also known for their ability to generate electricity, with three electric organs that contain cells called electrocytes. When the eel senses prey or feels threatened, it can release an electrical current of up to 600 or 860 volts to stun or kill its prey and protect itself from predators.
The electric eel's name comes from the Greek words "ḗlektron," meaning amber, a substance that can hold static electricity, and "phérō," meaning "I carry," thus giving the meaning "electricity bearer." Despite their electric capabilities, electric eels are not closely related to true eels, which mostly live in saltwater. True eels belong to the order Anguilliformes, while electric eels are classified in the order Gymnotiformes with the knife fishes.
Electric eels are sexually dimorphic, with males being larger and starting to reproduce at a body length of around 1.2 meters, while females begin reproducing at a length of about 70 centimeters. They exhibit prolonged parental care, with males providing protection for both the young and the nest. In captivity, electric eels have been known to live for over 20 years.
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They are found in the calm waters of the Amazon and Orinoco river basins
Electric eels are not found in the ocean. They are a genus of neotropical freshwater fish from South America. They are found in the calm waters of the Amazon and Orinoco river basins, as well as in the Guiana Shield and Brazilian Shield. They are also found in the upland waters of the rivers of Surinam, in the lowlands, and in swamps.
These eels are known for their ability to stun their prey by generating electricity, delivering shocks of up to 860 volts. They are also air-breathers, meaning they need to surface about every ten minutes to breathe. They are mostly nocturnal and feed on invertebrates, amphibians, fish, and crustaceans.
The natural habitat of electric eels is in murky pools and calm waters. They are mostly blind and rely on low-level electrical pulses to navigate and explore their surroundings. They can grow to more than eight feet in length and weigh nearly 45 pounds.
The scientific name for the electric eel is Electrophorus electricus. The name comes from the Greek words "ḗlektron" (amber, a substance able to hold static electricity) and "phérō" (to carry), thus meaning "electricity bearer". Despite their name, electric eels are not closely related to true eels and are, in fact, more closely related to knife fish.
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Electric eels are not closely related to true eels
Electric eels are air-breathing animals, meaning they need to surface about every ten minutes to breathe. They have tiny gills, but these do not ventilate when taking in air. Instead, they take in air through their mouths, hold it in their buccal cavity, and expel it through the opercular openings at the sides of their heads. They can survive on land for a few hours if their skin is wet enough.
True eels, on the other hand, can breathe underwater with gills. They are elongated finned-fish belonging to the order Anguilliformes. There are over 800 species of true eel, ranging from about 5 cm to 4 m in length. Some true eels travel between saltwater and freshwater environments to breed. For example, the European eel travels over 4,800 km from rivers in Europe to the Sargasso Sea to mate.
The main feature that distinguishes electric eels from true eels is, of course, their electricity. Electric eels have three electric organs that contain cells called electrocytes. When they sense prey or feel threatened, the electrocytes create an electrical current of up to 600 volts. This current is enough to incapacitate their prey and deter predators.
In summary, electric eels and true eels are two very different types of creatures. They differ in their evolutionary history, habitat, breathing mechanisms, and, most notably, the electric eel's ability to produce an electric current.
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They can produce shocks of up to 860 volts
Electric eels are not actually eels, but a type of neotropical freshwater fish from South America. They are found in streams, swamps, and pools, and are obligate air-breathers, needing to surface about every ten minutes to breathe. They have poor vision but use electrolocation to navigate, emitting a low voltage for this purpose.
Electric eels have three electric organs that contain cells called electrocytes. These electrocytes create an electrical current of up to 860 volts when the eel senses prey or feels threatened by a predator. This high-voltage shock can be used to stun prey or deter predators. The electric organs are located at the end of the eel's body, which may help protect the rest of the body from the shock.
The electric eel's shock is powerful enough to be lethal to humans, with documented instances of people and animals dying from the shock. However, the electricity dissipates quickly, and the range is not very far, so the closer you are to an electric eel, the more likely you are to be harmed.
The electric eel's ability to produce electricity is similar to that of certain species of catfish and ray, which can produce up to 400V and 200V, respectively. This is an example of convergent evolution, where unrelated species develop similar adaptations.
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Electric eels are nocturnal and have poor vision
Electric eels have three pairs of electric organs, which make up about 80% of their body: the main electric organ, the Hunter's organ, and the Sachs' organ. The remaining vital organs are packed near the front of the animal, taking up only 20% of the space. Electric eels can generate up to 600-800 volts of electricity, which they use for hunting and defence. They are found in freshwater in South America and are not closely related to true eels, which mostly live in saltwater.
The electricity produced by electric eels is released in pulses, with a short duration and varying frequency. This electricity is used for communication, as well as for hunting and defence. Electric eels can interpret information about other individuals in the water, including their sex and sexual receptivity, through electric organ discharges. This method of communication is also used by over 220 species of South American knifefish related to the electric eel.
In the dark and murky waters they inhabit, electric eels rely on their electrolocation and motion-sensitive hairs along their bodies to detect prey. They are generalist carnivores, feeding on fish, crustaceans, insects, and small vertebrates. Electric eels grow continuously throughout their lives, adding more vertebrae to their spinal column.
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Frequently asked questions
No, electric eels are freshwater animals found in South America.
They are found in the Guiana Shield, the Brazilian shield, and the middle and lower Amazon and Orinoco river basins.
They are found in calm waters, pools, streams, and swamps with muddy or low-oxygen water.
Electric eels are air-breathers, meaning they need to surface about every ten minutes to breathe.
They have three electric organs that contain cells called electrocytes. When the electric eel senses prey or feels threatened by a predator, electrocytes create an electrical current that can release up to 600 or 860 volts.
