Tuna is a large, pelagic and important commercial food fish, found in the warm waters of the world. It is found in the warm waters of the world and is closely related to the mackerel, horse mackerel and mackerel, and usually belongs to the mackerel family. There is considerable variation within the family and between species, and the classification is very different, and authorities are divided on this.
Tuna is also known as tuna, Hong Kong is called tuna, Macau is the old Portuguese translation of the Asian winter fish, most of them belong to the genus tuna.
There are eight species of tuna, most of which are very large, the largest being 3.5 meters long and weighing 600 to 700 kilograms, while the smallest species weighs only 3 kilograms.
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The mackerel (Pneumatophorus japonicus) is a species of mackerel in the order Perciformes, family Mackerelidae. It is also known as: mackerel, oil carcass fish, mackerel, flower pool fish, flower bar, flower anchovy, blue Jim, flower herring, barangay, mackerel mackerel. The body is stout, fusiform, with a firm caudal peduncle; the base of the caudal fin has two longitudinal elevated crests on each side. The head is large, with a thin, conical anterior tip. The eyes are large and high, with well-developed blubbery eyelids. Upper and lower jaws equal in length; teeth fine, one row each of upper and lower jaw teeth. Lateral line distinct. Two dorsal fins. Dorsum of body greenish blue. There are irregular dark blue transverse stripes or markings. The markings extend below the lateral line. It is a migratory pelagic fish with strong swimming power and high speed. The mackerel is one of the most important pelagic fish in China. The body of the mackerel is stout, slightly flat and fusiform, generally 20-40 centimeters long and weighing 150-400 grams.
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The mackerel is also known as Pacific mackerel. Commonly known as mackerel, Atlantic mackerel, Boston mackerel, tin-ker mackerel, Pacific mackerel, Japanese mackerel, chub mackerel, American mackerel, blue mackerel, bamboo mackerel
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Mackerel (Scomberomorus niphonius), also known as the blue-spotted horse mackerel, Japanese Spanish mackerel, commonly known as the mackerel, bamboo mackerel, the southern Fujianese language called the fish, also known as the green mackerel. It is also known as the Green Chamois. The body is long and narrow, with a blue-black head and dorsal surface. There are several rows of blue-black round spots on the upper side, the abdomen is white, and there are angular spines after the dorsal and anal fins. In the summer and fall, it is often grouped together for long-distance migration. Mackerel spines less meat, body fat, and "snow vegetables" with the burning of exceptionally delicious, can be used as "smoked fish", can also be salted, is a good meal. Distributed in the western North Pacific Ocean, China's production in the East China Sea, the Yellow Sea and the Bohai Sea, in the South China Sea to Hainan Wenchang pavement in front of the nearby waters of the most famous.