bluefin tuna,types of tuna fish

bluefin tuna

The bluefin tuna is one of the largest types of tuna fish, and the body of the bluefin tuna is a deeper color near the pelvis fins, and there is a gradual color significantly at the caudal fin, and compared to the other tuna, the head of the bluefin tuna is long and pointed Somewhat, the eye is small, and there are two dorsal fins, with little space separating them.

The second dorsal fin in the bluefin tuna is longer than the first, the anal fin starts behind the second dorsal fin, and the pectoral fins are short compared to other members of the tuna genus although the relative length changes with age .

Information about bluefin tuna

The color of the bluefin tuna body is dark metallic blue at the top of the body with the lower sides, and the belly tends to silver white, and in new samples of the bluefin tuna can be seen colorless lines alternately with rows of points along the lower sides, and the dorsal fin The first has a yellow or blue color, the second dorsal fin is red or brown, and the anal fin has a black color, while the caudal fin is black.

Habitat of bluefin tuna:

This type of tuna lives in the seas and oceans and approaches beaches in the season, and the bluefin tuna can withstand a wide range of temperatures reaching a depth of more than 3000 feet or about 9,850 feet.

Bluefin tuna showed very active behavior while it is very small in the form of swarms, and these swarms are active at night, and swarms of bluefin tuna seasonally migrate north during the summer months along the coast of Japan and the Pacific coast of North America, and adult fish migrate across the ocean The quiet, some migrate to the east, and some towards the west, and some studies have shown that this type of tuna can cross the Atlantic in less than 60 days, and they can swim at speeds of up to 45 miles per hour (72.5 km / hour).

Bluefin tuna and diet:

The feeding strategy of bluefin tuna depends on its target prey, and it uses rapid and lively stalking to obtain swarms of small fish, especially anchovies, while using a modified filtration technique to catch small, slow-moving creatures, and bluefin tuna is fed near the beach when eating food Starfish, kelp, and smaller shallow water fish are likely to lose nutrition during the spawning season, as blue fin tuna should devote to egg laying, and blue fin tuna competitors for food are marine mammals and large fish in size.

Fishing for bluefin tuna:

Information about bluefin tuna

Blue fin tuna is valued as a highly valued fish around the world, and tuna is sold fresh or frozen, and distinct fish are especially preferred in Japan, where the price rises in the raw seafood market, as one fish can be sold for about $ 45,000, Also, bluefin tuna are also popular fish, especially in the United States of America, where they are caught by hooks and strings in some areas, and it is reported that bluefin tuna does not eat the bait easily so it is called stubborn tuna.

 Size of bluefin tuna:

The maximum length of this type of tuna is 180 inches (458 cm), and the maximum weight is 1506 lbs (684 kg), but usually the bluefin tuna is 78 inches (200 cm), and this tuna has a lifespan of about 15 Years old.

 Prevalence of bluefin tuna:

Bluefin tuna spreads in the Atlantic and Pacific oceans in subtropical and temperate waters, and is also found in the western Atlantic Ocean from Labrador, Canada, to northern Brazil, including the Gulf of Mexico. In the eastern Atlantic Ocean, it is located in Norway from the Canary Islands, in the western Pacific Ocean, it is distributed from Japan to the Philippines, and in the eastern Pacific Ocean, it is distributed from the southern coast of Alaska, USA to Baja California, Mexico.




The reference
 
wikipedia