Tuna is not a certain kind of fish, but a general term for many kinds of fish in the family Sparidae, including tuna, mackerel, mackerel, mackerel, mackerel and mackerel. Therefore, there are many species, including more than 50 species. The common ones are yellowfin tuna, bigeye tuna, bluefin tuna, albacore tuna, bonito tuna and Ma Su tuna, which have certain differences in distribution and habits.
Extension: What are the common species of tuna?
1, yellowfin tuna
Yellow fin tuna is named for its yellow dorsal fin and anal fin. Not only that, but even its fish has a faint yellow stripe in the middle, so it is also called yellow muscle tuna. Widely distributed in the equatorial waters of the three oceans, it is a representative species in tropical waters. Yellow fin tuna is light in color, pink and refreshing in taste. Except sashimi and sushi, most of them are used for canning.
2.bigeye tuna
Big-eyed tuna, also known as fat tuna, is mainly distributed in tropical and subtropical waters of Atlantic Ocean, Indian Ocean and Pacific Ocean, and is the tuna species with the largest catch. Big-eyed tuna is named for its bright eyes. Its body length is generally about 1.5-2 meters, and its weight is about 150 kilograms, and the largest can reach more than 300 kilograms. Compared with full bluefin tuna, bigeye tuna has higher water content and lighter taste.
3.bluefin tuna
Bluefin tuna, also known as "black tuna", belongs to the top species of tuna. At present, due to overfishing of bluefin tuna, some species are on the verge of extinction, and the price is rising. Rare things are precious, and the natural price is also the highest in the tuna industry. There is a saying that "90% of the wild bluefin tuna in the world swim happily in the stomachs of Japanese people". Even Spain, Greece, North America, New Zealand, Morocco and many other countries have become important sources of Japanese tuna.
4. albacore tuna
The back of the body is dark blue, the side and abdomen are silvery white, and the body color is uniform. Body length 1 ~ 1.5m, weight about 15kg. Large individuals can reach 45 kilograms. This is a small tuna. The most striking feature is that the pectoral fin is knife-shaped and extremely long. Albacore tuna is abundant, and most of it is used to make canned food. Fish is generally light pink in color and rich in oil, which is also a common ingredient in sushi restaurants. It can also be used to make salads, sandwiches or rice balls.
5.bonito
Spindle-shaped body, blue-brown back and silvery white abdomen, characterized by 4 ~ 7 longitudinal stripes on the side, is the smallest tuna, also known as bullet fish. Generally, the body length is 0.4 ~ 0.5 meters, and the big one is more than 1 meter. It is an important edible fish, mostly used as sashimi (sashimi) and fish floss.
6. Tuna in Ma Su
It is carnivorous and has a wide range of feeding habits, mainly bonito and mackerel, shrimp and squid, and is an impatient predator. Widely distributed in the waters of high latitudes (30 ~ 60 s) in the southern hemisphere of the three oceans, it belongs to oceanic highly migratory fish. Tuna in Ma Su is generally 160 cm long, with a maximum length of 245 cm and a maximum weight of 260 kg. Sushi shops often make sushi with high-quality fat fish.
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