Professor Wu Hanlin, a fish expert at Shanghai Fisheries University, explained that this is not tuna, but jawed needlefish, also known as green needlefish and billfish. It is edible and its bones are naturally green. Its body shape and the ribbon fish like, long cylindrical, slightly flattened, body length of about 1 meter, weighing 150 grams -300 grams, the most obvious feature is that the upper and lower jaw outstretched, pointed and long, some fishmongers falsely claimed to be tuna, thereby raising the price. It is understood that the market price of the jaw needle fish is only 4 yuan per catty -5 yuan.

Professor Wu reminded consumers that the real tuna is round, like a torpedo, the surface of the black and gray, its body shape and jaw needle fish have obvious differences. (Evening News)