--- title: "How Long Do Eels Live? Lifespans From Morays to 85-Year Eels" url: https://thesea.org/how-long-do-eels-live/ date: 2026-11-13 modified: 2026-11-13 lang: en author: "Blane Perun" description: "TheSea.Org▸Eels▸How Long Do Eels Live? How Long Do Eels Live? — From Short-Lived Congers to Century-Old Longfins and 80-Year Aquarium Eels Eels By Blane Perun November 13, 2026 9 min..." categories: - "Eels" word_count: 2050 --- # How Long Do Eels Live? Lifespans From Morays to 85-Year Eels [TheSea.Org](/)▸[Eels](/eels/)▸How Long Do Eels Live? # How Long Do Eels Live? — From Short-Lived Congers to Century-Old Longfins and 80-Year Aquarium Eels Eels By [Blane Perun](/about-blane-perun/) November 13, 2026 9 min read How long can eels live? Most wild freshwater eels live about 5 to 20 years before migrating to sea to spawn and die, but slow-growing females in cold water can live 50 years or more, and New Zealand longfin eels have been aged at around a century. Captive European eels have reportedly lived past 80. Morays commonly live a few decades; congers usually less than 15 years. Quick facts Typical freshwater eel**5–20 years** in the wild Long-lived wild eelsNZ longfin females, around 100 years Captive record (claimed)European eels in Sweden, 80+ years Moray eelsOften 10–30+ years Conger eelsAbout 5–15 years, then spawn and die Electric eel15–20+ years in captivity How age is measuredGrowth rings in ear stones (otoliths) Why lifespans varyTemperature, food, sex and when the eel matures Eels hold some of the most surprising lifespan records in the fish world. A freshwater eel can spend decades in a pond waiting for the right moment to swim off and spawn, and eels kept in captivity, where they never get the signal to migrate, have lived far longer than most people would believe. Yet other eels, such as congers, live fast and die after a single spawning. The answer to "how long do eels live?" depends on which eel you mean and where it grew up. Here's a species-by-species guide. Why eel lifespans vary so much Most freshwater eels die after spawning, so lifespan really means "time until maturity". Freshwater eels of the genus *Anguilla* breed only once, at the end of their lives, after migrating thousands of kilometres to an ocean spawning ground. Everything before that is a long growth phase as a "yellow eel" in rivers, lakes and estuaries. So the question of how long an eel lives is really the question of how long it takes to grow big enough, and fat enough, to make the trip. Our [eel life cycle](/eel-life-cycle/) guide explains the stages. Several things control that timing. Eels in warm, productive water grow quickly and may be ready in five years or less. Eels in cold, nutrient-poor northern lakes can take 20, 30 or even 50 years. Females, which grow much larger than males and need bigger reserves, usually stay longer than males. And eels that can't migrate, because they're trapped behind a dam or kept in an aquarium, can keep living long past the age at which they'd normally have left. ![Large old European eel on a cold lake bottom; how long eels live depends on slow growth](https://thesea.org/wp-content/uploads/how-long-do-eels-live-1-thesea-org-by-blane-perun.webp)Large old European eel on a cold lake bottom; how long eels live depends on slow growth How long do European and American eels live? Typically 5 to 20 years in the wild, sometimes much longer. Studies of European eels (*Anguilla anguilla*) across their range show huge variation. In the warm lagoons of the Mediterranean, males can mature in two or three years and females in four to eight. In Scandinavian and Baltic waters, females may not leave until they're 20 or older, and some have been aged at 50 years or more. American eels (*Anguilla rostrata*) follow the same pattern from Florida to Canada, with eels in southern rivers maturing much sooner than those in the cold rivers of the north. Big female American eels in northern lakes can be several decades old. The 80-year aquarium eels Captive eels in Sweden became famous for their age. The most famous long-lived eels are European eels from Sweden. An eel known as Putte, kept in an aquarium in Hälsingborg, was reported to have lived for around 85 years, from the 1860s until 1948, after being caught as a young eel. Even more remarkable claims surround eels kept in wells in the fishing village of Brantevik, in southern Sweden, where it was once common to put an eel in the household well to eat insects and keep the water clean. One of these well eels was said to have been put there in the 1850s and to have lived until 2014, though its age couldn't be verified. Whatever the exact figures, these stories show something real: a freshwater eel that never gets the cue to migrate and spawn can keep living for a very long time. The silver-eel transformation and the spawning journey are what normally end an eel's life, not old age. ~85 yrsReported age of Putte, a captive European eel ~100 yrsOldest NZ longfin eels aged from otoliths 1Spawning per lifetime in freshwater eels The New Zealand longfin: a century-old wild eel The longest-lived eels in the wild may be in New Zealand. The New Zealand longfin eel (*Anguilla dieffenbachii*) is found only in New Zealand, where it lives in rivers and lakes from the coast to high inland waters. It grows slowly, and females don't migrate to sea to spawn until they are very large and very old. Ageing studies using ear stones have found females several decades old as a matter of course, and some individuals have been estimated at around a hundred years. That makes the longfin one of the longest-lived freshwater fish known. It's also why longfins are especially vulnerable: a fishery that removes big females takes animals that may have been growing since before anyone fishing today was born. How long do moray eels live? Decades, though wild data are scarce. Moray eels don't migrate and die after spawning the way freshwater eels do. They breed repeatedly over their lives, so their lifespan is set by predators, disease, food and old age. Very few wild morays have been aged, but the evidence suggests they grow slowly and live a long time. Morays in public aquariums have commonly lived for 10 to 20 years, and some have lived for more than 30. Large wild giant morays and green morays are likely to be at least several decades old. Divers who return to the same sites year after year sometimes recognise individual morays living in the same holes for many seasons. If you want to see a long-lived moray, wrecks and protected reefs are your best bet. Several of my dive guides, including the [Key Largo](/key-largo-scuba-diving-galleries/) wreck dives and Molasses Reef in the [Key Largo dive guide](/key-largo-dive/), describe resident morays. More on the family in our [moray eel](/moray-eel-muraenidae/) guide. ![Conger eel in a shipwreck hole; how long eels live varies, and congers grow for years](https://thesea.org/wp-content/uploads/how-long-do-eels-live-2-thesea-org-by-blane-perun.webp)Conger eel in a shipwreck hole; how long eels live varies, and congers grow for years How long do conger eels live? Fast-growing and short-lived by eel standards. The European conger (*Conger conger*) grows quickly to its huge size, then ends its life after a single spawning, like a freshwater eel. Congers are thought to mature between about 5 and 15 years of age. As they mature they stop feeding, their skeleton softens and their teeth fall out, and they migrate to deep water to spawn and die. A conger that grows to record size is therefore unlikely to be more than about 15 years old, much younger than many freshwater eels of a fraction of its weight. See our [conger eel](/conger-eel-congridae/) page for details. | Eel | Typical lifespan | Maximum reported | Ends with | | --- | ---------------- | ---------------- | --------- | | European eel | 5–20 years (wild) | 50+ wild; ~85 captive (reported) | Single spawning migration | | American eel | 5–20 years (wild) | Several decades in northern waters | Single spawning migration | | NZ longfin eel | Decades | Around 100 years | Single spawning migration | | Moray eels | 10–30 years | 30+ in aquariums | Old age, predation | | European conger | 5–15 years | About 15 years | Single deep-water spawning | | Electric eel (not a true eel) | 15–20 years (captive) | 20+ years | Old age | How scientists tell an eel's age The answer is in the ear. Like other bony fish, eels have small stones in their inner ears called otoliths, made of calcium carbonate. Otoliths grow by adding layers, and in temperate waters growth slows in winter and speeds up in summer, leaving visible rings much like the rings of a tree. Biologists remove the otoliths, polish or stain them, and count the rings under a microscope. Chemical analysis of the layers can also show whether an eel spent each part of its life in fresh, brackish or salt water. We look at eel otoliths in our page on [eel bones](/eel-bones/). Ageing eels is still tricky. Rings can be faint or doubled, and eels in warm climates don't always form clear annual rings. That's why some of the most extreme ages, especially for captive eels without records, should be treated as estimates. Do eels die of old age? Usually not. Most die after spawning or are eaten long before. In the wild, very few eels reach their maximum possible age. Larvae and glass eels die in huge numbers in their first year. Yellow eels are eaten by birds, fish and mammals, caught by fishermen, killed by turbines and pumps, or weakened by parasites and pollution. Freshwater eels and congers that survive all that end their lives at the spawning grounds. Morays, which can spawn many times, are the eels most likely to live out a natural lifespan on the reef. When I think about eel lifespans, what strikes me is the patience. A female eel in a cold lake may spend half a century preparing for one journey and one spawning. Losing her to a fishing net or a hydropower turbine wipes out all of that investment, which is a big part of why freshwater eels have declined so fast. For more on how eels reproduce, see [how eels reproduce](/how-do-eels-reproduce/). How long do eels live in an aquarium? Often longer than in the wild, with the right care. Aquarium eels are spared predators, fishing gear and, for freshwater eels, the spawning migration that normally ends their lives. With stable water quality, a suitable diet and enough space, many eels live a long time in captivity. Morays kept in public and private aquariums often reach 10 to 20 years, and some have done much better. Freshwater eels kept in ponds and tanks have a reputation for outliving their owners' expectations, as the Swedish examples show. The main things that shorten captive eel lives are poor water quality, an unsuitable diet, escape (eels are famous escape artists and need tight-fitting lids) and tanks that are too small for the adult fish. Having kept reef aquariums since 1996, from a 40-gallon tank up to a [coral farm](/coral-farm-stock-tanks/) of stock tanks, I'd say the escape problem is the one most new keepers underestimate. An eel that finds a gap at the back of a lid will be out of the tank overnight. If you're considering any eel, research its adult size and lifespan first, and plan for an animal that may be with you for decades. ![Old giant moray resting in a reef cave, a long-lived species for asking how long eels live](https://thesea.org/wp-content/uploads/how-long-do-eels-live-3-thesea-org-by-blane-perun.webp)Old giant moray resting in a reef cave, a long-lived species for asking how long eels live Frequently asked questions How long do eels live? Most wild freshwater eels live 5–20 years before spawning and dying, but some live 50 years or more. Captive eels have reportedly lived over 80 years. How long do moray eels live? Often 10–30 years, and some captive morays have lived more than 30 years. What is the oldest eel ever recorded? Captive European eels in Sweden were reported at around 85 years and older, and New Zealand longfin eels have been aged at about 100 years. How long do conger eels live? About 5–15 years. They spawn once in deep water and then die. How long do electric eels live? About 15–20 years or more in captivity. Wild lifespans are less well known. How can you tell how old an eel is? By counting growth rings in its otoliths (ear stones), much like tree rings. Do eels die after they breed? Freshwater eels and congers do. Morays can breed many times. Sources & further reading - Tesch, F.-W. (2003). *The Eel*, 3rd ed. Blackwell. - NIWA (National Institute of Water and Atmospheric Research, New Zealand): longfin eel biology and ageing research. - U.S. Fish and Wildlife Service, American eel species profile. - ICES Working Group on Eels (WGEEL), reports on European eel biology and status. - Froese, R. & Pauly, D. (eds.). FishBase: *Conger conger*, Muraenidae. Continue reading More from Eels [EelsEel Life CycleFrom leptocephalus to silver eel. ](/eel-life-cycle/) [EelsMoray EelFacts, species and behaviour. ](/moray-eel-muraenidae/) [EelsReef EelsMorays, garden eels, snake eels and congers. ](/eels/) BP Last updated November 13, 2026 Written by Blane Perun Blane Perun has been exploring Earth’s oceans and marine life for over 25 years. Founder of TheSea.Org in 1999, underwater photographer, coral aquaculture pioneer, and explorer of 80+ countries. [About Blane Perun →](/about-blane-perun/) [More on Eels →](/eels/)