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Surimi

A tub of uncured fish surimi ready for finish-processing

A tub of uncured fish surimi ready for finish-processing

Surimi (Japanese: 擂り身, すり身, literally “ground meat”) refers to a paste made from fish or other meat, as well as multiple Asian foods that use surimi as its primary ingredient. It is available in many shapes, forms, and textures, and often used to mimic the texture and colour of the meat of lobster, crab, and other shellfish.

The most common surimi product in the Western market is imitation crab meat. Such a product often is sold as krab, imitation crab and mock crab in the United States, and as seafood sticks, crab sticks, fish sticks or seafood extender in Australia and other Commonwealth nations. In Britain the product is sometimes known as Ocean sticks, to avoid trading standards issues with regards to misleading advertising.

History of Surimi

The process for making surimi was developed in many areas of East Asia over several centuries though the exact history and origins of this product are unclear. In China, the food was used to make fish balls (魚蛋/魚丸) and ingredients in a thick soup known as Geng (羹) common in Fujian cuisine. In Japan, it is used in the making of numerous kamaboko, fish sausage, or cured surimi products.

Crab sticks – imitation crab meat made from surimi

Crab sticks – imitation crab meat made from surimi

The industrialised surimi-making process was refined in 1969 by Nishitani Yōsuke of Japan’s Hokkaidō Fisheries Experiment Institute to process the increased catch of fish, to revitalise Japan’s fish industry, and to make use of what previously was considered “fodder fish”. Surimi industrial technology developed by Japan in the early 1960s promoted the growth of the surimi industry. The successful growth of the industry was based on the Alaska Pollock (or walleye pollock). Subsequently, production of Alaska pollock surimi declined and was supplemented by surimi production using other species.

Currently, 2–3 million tons of fish from around the world, amounting to 2–3 percent of the world fisheries’ supply, are used for the production of surimi and surimi-based products. The United States of America and Japan are major producers of surimi and surimi-based products. Thailand has become an important producer. China’s role as producer is increasing. Many newcomers to the surimi industry have emerged, including Lithuania, Vietnam, Chile, the Faroe Islands, France, and Malaysia.

Vietnamese Chạo tôm (barbecued shrimp surimi on a sugar cane) with rice vermicelli, bean sprouts, shredded carrot and lettuce, mint, and crushed peanuts

Vietnamese Chạo tôm (barbecued shrimp surimi on a sugar cane) with rice vermicelli, bean sprouts, shredded carrot and lettuce, mint, and crushed peanuts

Production of Surimi

Lean meat from fish or land animals is first separated or minced. The meat then is rinsed numerous times to eliminate undesirable odours. The result is beaten and pulverised to form a gelatinous paste. Depending on the desired texture and flavour of the surimi product, the gelatinous paste is mixed with differing proportions of additives such as starch, egg white, salt, vegetable oil, humectants, sorbitol, sugar, soy protein, seasonings, and enhancers such as transglutaminases and monosodium glutamate (MSG).

If the surimi is to be packed and frozen, food-grade cryoprotectants are added as preservatives while the meat paste is being mixed. Under most circumstances, surimi is processed immediately into a formed and cured product.

Fish Surimi

Typically the resulting paste, depending on the type of fish and whether it was rinsed in the production process, is tasteless and must be flavoured artificially. According to the United States Department of Agriculture National Nutrient Database, fish surimi contains about 76% water, 15% protein, 6.85% carbohydrate, and 0.9% fat.

Sugiyo Crab stick "Kaori-bako"

Sugiyo Crab stick “Kaori-bako”

In North America and Europe, surimi also alludes to fish-based products manufactured using this process. A generic term for fish-based surimi in Japanese is “fish-puréed products” (魚肉練り製品 gyoniku neri seihin).

The fish used to make surimi include:

  • Alaska pollock (Theragra chalcogramma)
  • Atlantic cod (Gadus morhua)
  • Big-head pennah croaker (Pennahia macrocephalus)
  • Bigeyes (Priacanthus arenatus)
  • Golden threadfin bream (Nemipterus virgatus)
  • Milkfish (Chanos chanos)
  • Pacific whiting (Merluccius productus)
  • Various shark species
  • Swordfish (Xiphias gladius)
  • Tilapia
    • Oreochromis mossambicus
    • Oreochromis niloticus niloticus
  • Black bass
    • Smallmouth bass (Micropterus dolomieu)
    • Largemouth bass (Micropterus salmoides)
    • Florida black bass (Micropterus floridanus)

Meat Surimi

Indonesian bakso, a type of food made from cooked beef surimi

Indonesian bakso, a type of food made from cooked beef surimi

Although seen less commonly in Japanese and Western markets, pork surimi (肉漿) is a common product found in a wide array of Chinese foods. The process of making pork surimi is similar to making fish surimi except that leaner cuts of meat are used and rinsing is omitted. Pork surimi is made into pork balls (Chinese: gòngwán; 貢丸) which, when cooked, have a texture similar to fish balls, but are much firmer and denser.

Pork surimi also is mixed with flour and water to make a type of dumpling wrapper called “yànpí” (燕皮 or 肉燕皮) that has the similar firm and bouncy texture of cooked surimi.

Beef surimi also can be shaped into a ball form to make “beef balls” (牛肉丸). When beef surimi is mixed with chopped beef tendons and formed into balls, “beef tendon balls” (牛筋丸) are produced. Both of these products commonly are used in Chinese hot pot as well as served in Vietnamese “phở”. Bakso, made from beef surimi, is a popular common food found in Indonesia.

The surimi process also is used to make turkey products. It is used to make turkey burgers, turkey sausage, turkey pastrami, turkey franks, turkey loafs and turkey salami.

 Japanese Satsuma age

Japanese Satsuma age

Uses and Products

Surimi is a useful ingredient for producing various kinds of processed foods. It allows a manufacturer to imitate the texture and taste of a more expensive product, such as lobster tail, using a relatively low-cost material. Surimi is an inexpensive source of protein.

In Asian cultures, surimi is eaten as a food in its own right and seldom used to imitate other foods. In Japan fish cakes (kamaboko) and fish sausages, as well as other extruded fish products, are commonly sold as cured surimi.

In Chinese cuisine, fish surimi, often called “fish paste”, is used directly as stuffing or made into balls. Balls made from lean beef (牛肉丸, lit. “beef ball”) and pork surimi often are seen in Chinese cuisine. Fried, steamed, and boiled surimi products also are found commonly in Southeast Asian cuisine.

In the West, surimi products usually are imitation seafood products, such as crab, abalone, shrimp, calamari, and scallop. Several companies do produce surimi sausages, luncheon meats, hams, and burgers. Some examples include: Salmolux salmon burgers and SeaPak surimi ham, salami, and rolls. A patent was issued for the process of making even higher quality proteins from fish such as in the making of imitation steak from surimi. Surimi is also used to make kosher imitation shrimp and crabmeat, using only kosher fish such as pollock.

Surimi Curing

The curing of the fish paste is caused by the polymerisation of myosin when heated. The species of fish is the most important factor that affects this curing process. Many pelagic fish with higher fat contents lack the needed type of heat-curing myosin and are not used for surimi.

Certain kinds of fish, such as the Pacific whiting, cannot form firm surimi without additives such as egg white or potato starch. Before the outbreak of bovine spongiform encephalopathy (BSE, mad cow disease), it was an industrial practice to add bovine blood plasma into the fish paste to help its curing or gel-forming. Today some manufacturers may use a transglutaminase to improve the texture of surimi. Although illegal, the practice of adding borax to fish balls and surimi to heighten the bouncy texture of the fish balls and whiten the product is widespread in Asia.

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