European conger
A large marine eel found in the northeast Atlantic and Mediterranean Sea.
The European conger is a heavy-bodied eel native to the eastern Atlantic and Mediterranean. It reaches lengths of three metres and weights over seventy kilograms, making it the heaviest eel species known.
- Heaviest eel species, weighing up to 72 kg or possibly 160 kg.
- Native to the northeast Atlantic and Mediterranean Sea.
- Nocturnal predator hunting fish, squid, and crustaceans.
- Used in traditional Provençal bouillabaisse stew.
- Threatened by toxins from submerged military munitions.
What it is
This species is a long, scaleless eel with an anguilliform body shape. Adults typically measure one and a half metres but can reach three metres in length. The skin is usually grey or blackish on top with a white belly, marked by a row of small white spots along the lateral line. The head is conical and slightly flattened, featuring a rounded snout and prominent olfactory holes. Large gill openings sit on the sides, and conical teeth line the jaws. Dorsal and anal fins merge with the tail fin, while pectoral fins are present and ventral fins are absent. Females grow significantly larger than males, reaching maturity at two metres compared to the male average of one point two metres.
Where it lives
The European conger inhabits the eastern Atlantic Ocean, ranging from Norway and Iceland down to Senegal. It also lives in the Mediterranean and Black Seas. These eels prefer rough, rocky, and broken seafloor terrain. Young individuals stay close to the coast in shallow waters, often near reefs like the tegnùe in the Adriatic. As they mature, they move to deeper areas, typically between zero and five hundred metres. During migrations, they may dive much deeper, reaching depths of up to three thousand six hundred metres.
How it lives
These eels behave similarly to moray eels, hiding in rock crevices or holes called eel pits during the day. They emerge at night to hunt, feeding on live fish, cephalopods, and crustaceans. They also scavenge on dead or rotting fish. Large specimens can be aggressive toward humans and pose a danger to divers. Their diet makes them nocturnal predators that rely on ambush tactics within their rocky shelters. They share these hiding spots with other species, including moray eels.
Breeding and life cycle
Between five and fifteen years of age, adult congers undergo physical changes for reproduction. Their reproductive organs enlarge, skeletons lose mass, and teeth fall out. Females increase in size more than males. They then migrate to spawning grounds in the Mediterranean or Atlantic, though exact locations remain uncertain. Females release several million eggs. Both parents die shortly after spawning. The hatched larvae swim back to shallower coastal waters to grow until they reach sexual maturity.
Fish and people
Humans have consumed this eel since the Middle Pleistocene, with evidence found at Neanderthal sites in Portugal. Today, it remains a food source in various coastal regions. In Provence, France, conger is traditionally one of the three main fish used to make bouillabaisse, alongside rascasse and grondin. The meat is valued in local cuisines where the species is caught.
Status and threats
Conservation concerns arise from submerged military munitions. Congers seek seafloor crevices for nesting, leading them into corroded casings of torpedoes, bombs, or shells. This exposure causes contact with leaking toxins. A study from twenty twelve showed higher levels of mercury and arsenic in congers near munition dumps. These fish also suffer from severe skin lesions and nematode infestations due to pollution.
Questions people ask about European conger
How big does a European conger get?
Adults average one and a half metres long. The maximum recorded length is around three metres. Weight typically ranges from two and a half to twenty-five kilograms, but large specimens can reach seventy-two kilograms or possibly one hundred sixty kilograms.
Where does the European conger live?
It is found in the eastern Atlantic from Norway and Iceland to Senegal. It also inhabits the Mediterranean and Black Seas. Young eels stay in shallow coastal rocky areas, while adults move to deeper waters up to five hundred metres deep.
Is the European conger dangerous to humans?
Large specimens can be aggressive and pose a danger to divers. They hide in rock crevices and emerge at night to hunt. While they do not actively seek out humans, their size and predatory nature require caution near them.
What do European congers eat?
They are nocturnal predators that feed on fish, cephalopods, and crustaceans. They also scavenge on dead and rotting fish. They hunt by emerging from their rocky holes at night to catch live prey.
Good reading and sources
- European conger on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "European conger", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
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