Tuna big fat and middle finger is mainly the difference between the fat:

Tuna big fat is rich in delicate oil, the middle fat of the oil content is slightly less, the best way to eat is directly sashimi, with the tip of the chopsticks to pick a small amount of freshly grated wasabi placed on one side of the thick slice of sashimi, clip up the other side dipped in the sashimi special soy sauce, and then a whole slice into the mouth.

The medium fat is found on the belly and back of the tuna, and contains a moderate amount of fat. In the mouth, you can feel both the sweetness and softness of the fat and the slight sourness of the fish, a texture and flavor between big fat and teriyaki. If Big Fat is Yang Yuhuan, then this is Sable Cicada, balancing between fat and thin, holding between Lu Bu and Zhuo, everything is just right.

Tuna edible note:

Tuna is a kind of animal that grows in the deep sea, and tuna this kind of food is precisely because it grows in the deep sea, so it is also listed as a kind of seafood food.

So in daily life, some people allergic to seafood food should pay attention not to choose this kind of food tuna, and tuna belongs to a kind of hair, so some people with traumatic injuries are advised not to eat tuna, because in the trauma of eating some hair is not conducive to the healing of the wound.