The side is brightly colored, the upper body is dark blue, the fins are dark, the small fins are yellowish, and the tail stalk ridge is black. It has scales all over the body, a large mouth, small eyes, a short pectoral fin, and the end is smaller than the center of the first dorsal fin, which is the biggest feature of this species. The body length is generally 1-3 meters, and the largest is more than 3 meters long and weighs more than 700 kilograms. Average body size: 200 ~ 400 kg. It can be used as edible fish, fishing and cultured fish.
Extended data:
Bluefin tuna are usually in groups of 50-60, and fish have more than 1000. The habitat water layer is from the water surface to 50 meters deep, and the optimum water temperature is 65438 00-20℃. The bait is mainly herring, sardines, mackerel, squid and crustaceans.
This fish regularly travels between the United States and Europe, and both populations are overfished. The Gulf of Mexico is one of the two known spawning grounds of Atlantic bluefin tuna, and the oil spill of BP has made the situation of bluefin tuna worse. It is estimated that the population of this tuna in the ecological crisis in North America is only about 9,000.