Atlantic mackerel
Fast-swimming, oily fish of the North Atlantic
The Atlantic mackerel is a common pelagic fish found in temperate waters of the northern Atlantic. It forms large schools and supports major commercial fisheries in Europe and North America. The species is valued for its high oil content and remains listed as Least Concern globally.
- Reaches lengths of up to 60 cm
- Contains high levels of omega-3 fatty acids
- Forms large schools near the surface
- Listed as Least Concern by IUCN
- Migrates seasonally between shore and deep water
What it is
This fish has a streamlined, spindle-shaped body with a pointed snout and large eyes. Its back is steel-blue with wavy black lines, while the belly is silvery-white. Small scales give the skin a velvet texture. Two spiny dorsal fins sit far apart on the back, followed by several smaller finlets. The tail is broad and forked. Adults typically measure 30 cm, though they can grow to 60 cm and weigh up to 3.4 kg.
Where it lives
It inhabits temperate waters across the northern Atlantic Ocean, including the Mediterranean, Black, and Baltic Seas. In the west, its range extends from Labrador to North Carolina. In the east, it lives from Iceland and Norway down to Mauritania. The fish prefers temperatures above 8 °C but tolerates colder water. It stays in the upper 200 metres of the ocean, moving closer to shore in summer and deeper offshore in winter.
How it lives
Atlantic mackerel are active swimmers that must keep moving to breathe. They form dense schools of similar-sized individuals near the surface. When feeding on plankton, they swim tightly together with mouths open, acting like living nets to trap prey. Copepods make up most of their diet. Larger fish swim faster due to greater muscle mass. They do not jump out of the water unless fleeing predators.
Breeding and life cycle
Spawning takes place in spring and summer near the coast. Females release up to 450,000 eggs, which float near the surface. Hatching time depends on water temperature, taking about a week in typical conditions. Larvae feed on yolk sacs before growing into juveniles. Young fish start schooling once they resemble adults. Sexual maturity arrives at around two years of age, and the fish can live for 17 years.
Fish and people
Fisheries catch nearly one million tonnes annually using nets and lines. Norway and the United Kingdom are top exporters. The meat is rich in oil, vitamins, and omega-3 fatty acids, with low mercury levels. It is sold fresh, smoked, or canned. In Canada, overfishing led to a temporary ban after stocks hit critical lows in 2021, though populations have since begun to recover.
Status and threats
The International Union for Conservation of Nature lists the species as Least Concern. Global catches remain sustainable despite high demand. However, local stocks face pressure. Canadian waters saw a sharp decline in 2021, leading to restricted fishing until numbers improve. Climate change may affect future distribution and population sizes, requiring ongoing monitoring.
Questions people ask about Atlantic mackerel
Is Atlantic mackerel safe to eat frequently?
Yes, it is very low in mercury compared to other large fish. Guidelines suggest it can be eaten at least twice a week. It is also rich in vitamin B12, selenium, and omega-3 fatty acids.
Where does the Atlantic mackerel live?
It is found in the temperate waters of the northern Atlantic Ocean, including the Mediterranean and Black Seas. It ranges from Canada to North Carolina in the west and from Norway to Mauritania in the east.
How big does an Atlantic mackerel get?
Most mature fish are about 30 cm long. The maximum recorded length is 60 cm, and the heaviest recorded weight is 3.4 kg. They have a streamlined body built for speed.
Why was fishing banned in Canada?
Commercial fishing drove the population to historic lows in 2021, placing it in the Critical Zone. This status indicates dangerously low reproductive ability. Fishing was banned to allow the stock to recover.
Good reading and sources
- Atlantic mackerel on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Atlantic mackerel", 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.
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