1, price: the market price of dragonfish is usually around 40-50 yuan, while the market price of balsa fish is usually 5-6 yuan, if the price is too low, it is balsa fish.

2, appearance: balsa fish is larger, no scales on the outside, blue-black back, whiter abdomen, narrower abdomen, flattened rounded head, rounded and wide at the end, fleshy and white whiskers around the muzzle and nose, dark bands on the side of the body, and darker caudal fins. While the dragonlance is smaller, flattened and lobed.

3, fish meat: balsa fish has thick fat between the skin and flesh, and its meat is thicker, while the fish meat of the dragonfish is thinner, and the right side of the fish meat is thicker compared to the left side of the fish meat.