Is tuna a deep-sea fish or a shallow-sea fish? Does it swim fast

Tuna is a deep-sea fish, and they like to live in the sea between 100 and 400 meters. Usually, fish below 200 meters can be called deep-water fish, so tuna is considered deep-water fish. However, different varieties have different depths of life. For example, some bluefin tuna will live in deep sea areas, while others will live in water depths of about 50 meters. There is also big-eyed tuna, which likes to live at a depth of 200-300 meters.

1. Is tuna deep-sea or shallow-sea fish

Tuna belongs to deep-sea fish because the sea area where they live is between 100 and 400 meters deep. Generally speaking, fish below 200 meters can be called deep-water fish, so tuna also belongs to deep-water fish. However, different species of tuna live in different depths of water. Like bluefin tuna, the depth of the sea area where they live is not fixed. Some will live in deep sea water, and some will live in the water depth of about 50 meters. Like big-eyed tuna, the distribution position will be deeper, about 200-300 meters. Of course, there are also very few people living on the surface of the ocean.

2. Do tuna swim fast

Tuna swim fast, and their average swimming speed can reach 60-80 kilometers per hour. If tuna starts swimming at high speed, the speed can reach 160 kilometers an hour. Tuna is a kind of marine life that swims faster, and its swimming speed can be comparable to that of sharks and dolphins.

Tuna has a special body structure. Their gills are degraded, and they need to swim constantly to get a lot of oxygen. If they stop moving, they may suffocate and die in a short time. Therefore, tuna only slows down when sleeping, instead of stopping directly.