Tuna is a marine fish of great economic value and ecological significance. Below is a detailed description of tuna:

Basic Information

Scientific name: Thunnus, a genus of tuna, is a genus of fish in the order Scleractinia, order Perciformes, family Scombridae.

Species: The genus Thunnus includes several species, such as albacore tuna (Thunnus alalunga), yellowfin tuna (Thunnus albacares), blackfin tuna (Thunnus atlanticus), southern bluefin tuna (Thunnus maccoyii), northern bluefin tuna (Thunnus thynnus), etc.

Appearance characteristics: Tuna are usually huge, with the largest members growing up to 4.6 meters long and weighing up to 680 kg. They have streamlined bodies with tapered ends, moderate mouths and well-developed teeth. The scales are wavy and usually small, and the body color is metallic, usually blue and silver.

Distribution area

The tuna is mainly found in the tropical and subtropical waters of the Indian Ocean, the central Pacific Ocean and the central Atlantic Ocean.

Habits

Diet: Tuna feed on a wide variety of organisms, including crabs, shrimp, squid, crustaceans, fish and invertebrate larvae, and fish about 1 meter long.

Swimming ability: tuna swim fast, speed up to 75 km per hour, but also endurance players, less than a few thousand kilometers, more nearly 10,000 kilometers of cross-continental foraging or breeding migrations is their annual homework must be done.

Schooling: Tuna prefer to school, but prefer to school with other individuals of the same size, not necessarily of the same species.

Economic Value

Tuna meat is so delicious and nutritious that it is known as "chicken meat in the sea" and is highly appreciated in the international market.

Its representative food products include sashimi in Japan and canned tuna in the United States.

The annual production value is as high as 40 billion dollars, and it is one of the most important marine fishery resources in the world.

Breeding and growth

Tuna has a strong reproductive ability, a 50 kg female fish can lay as many as 5 million eggs per year.

However, because of the slow growth rate, the total population continues to decline due to indiscriminate fishing.

Cultivation and Conservation

Despite its high economic value, tuna farming faces many challenges, such as long growth cycles and complex farming techniques.

Currently, many countries are strengthening the conservation and management of tuna resources to ensure their sustainable utilization.

To summarize, tuna is a marine fish with important economic value and ecological significance, and its conservation and management are of great significance to the maintenance of marine ecological balance and sustainable development.