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Pacific saury

life science Maturity 5-7 Next article →

The Pacific saury, known scientifically as Cololabis saira, is a distinctive species of fish. It belongs to the family Scomberesocidae. This fish is highly important in several East Asian cuisines. It is also a significant part of the North Pacific marine ecosystem.

Wakisashi-IMG 4686-87-88
Wakisashi-IMG 4686-87-88

The saury is a pelagic fish. This means it lives in the open ocean rather than near the shore. It is often found near the water's surface. However, it can also inhabit depths as deep as 200 meters.

The physical structure of the Pacific saury is quite specialized. It has an elongated body and a small mouth. A series of small finlets sit between the dorsal and anal fins. The fish also features a small, forked tail. Its coloration serves as a form of camouflage. The dorsal surface is dark green to blue. The underside is silvery. Small, bright blue blotches are distributed randomly along its sides.

Pacific saury dried overnight
Pacific saury dried overnight

Most caught fish are about 30 centimeters long. In the autumn, they can grow up to 40 centimeters. The average life expectancy for a saury is approximately four years.

Understanding how the saury survives requires looking at its diet and reproduction. The species is oviparous, which means it lays eggs. These eggs possess filaments on the shell surface. These tiny threads allow the eggs to attach to floating objects like seaweed. This is especially important for juveniles, who associate with drifting seaweed for safety.

RIAN archive 50343 Pacific saury processing
RIAN archive 50343 Pacific saury processing

To eat, the saury relies on zooplankton. This includes organisms like copepods, krill, and amphipods. They also consume the eggs and larvae of common fish, such as anchovies. Because the saury lacks a stomach and has short, straight intestines, it must feed in a specific way. It also carries harmless, red, earthworm-like parasites called Rhadinorhynchus selkirki in its internal organs.

The Pacific saury is a highly migratory species. It moves through vast areas of the North Pacific Ocean. Its range extends from China, Korea, and Japan eastward to the Gulf of Alaska. It also reaches southward to sub-tropical Mexico. These fish prefer water temperatures around 10 degrees Celsius.

Adults typically live in large groups called schools. These schools are usually found offshore near the surface. When escaping predators like tuna, squid, or marine mammals, they may float on the surface.

Human history with the saury has changed significantly over time. Around 1950, Japan caught about 98% of the global supply. South Korea accounted for about 2% of the catch. Since then, Japan's proportional share has decreased. The Soviet Union fished the species from around 1960 until its dissolution. Taiwan began its fishery around 1988. China joined the industry in 2002. Today, China catches over 100,000 tons of saury every year.

RIAN archive 50343 Pacific saury processing
RIAN archive 50343 Pacific saury processing

In Taiwan, about ninety vessels participate in long-distance fishing. Their landings were 30,000 metric tons in 2021 and 40,000 metric tons in 2022. Many Taiwanese boats now use LED lights to reduce environmental impact.

Cultural connections to the fish are strongest in Japan and Korea. In Japan, the fish is called sanma. The kanji for sanma (秋刀魚) translates to "autumn knife fish." This name refers to its body shape, which resembles a katana sword.

サンマの塩焼き - 1
サンマの塩焼き - 1

It is a prominent seasonal food in autumn. It is often served salted and grilled with grated daikon oroshi. Some people even enjoy the bitterness of the intestines. In Korea, the fish is called kkongchi. In North Gyeongsang Province, people make gwamegi. This is a dish of half-dried saury made during the winter.

Gwamegi
Gwamegi

Other regions also have unique ways of using the saury. In Russia, the fish is called saira. It is often sold in cans with salt, spices, or tomato sauce. It can also be eaten smoked.

Open can of saury
Open can of saury

In the United Kingdom, the fish is sometimes called "blueys." This name likely comes from people confusing it with blue mackerel. In the UK, it is frequently used as bait for sea fishing. The saury is also chemically interesting. Its oil contains high levels of n-3 unsaturated fatty acids and long-chain monounsaturated fatty acids.

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🖼️ Images & Media (7)
File:Pacific saury dried overnight.jpg
Pacific saury dried overnight.jpg
File:サンマの塩焼き - 1.jpg
サンマの塩焼き - 1.jpg
File:Wakisashi-IMG 4686-87-88.jpg
Wakisashi-IMG 4686-87-88.jpg
File:Gwamegi.jpg
Gwamegi.jpg
File:Open can of saury.jpg
Open can of saury.jpg
File:RIAN archive 50343 Pacific saury processing.jpg
RIAN archive 50343 Pacific saury processing.jpg
File:Pacific saury, capture production, thousand tonnes, 1950-2022.svg
Pacific saury, capture production,...
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