Different in appearance. Hairtail has no scales, while yellow croaker has scales, and the body color of hairtail is light while yellow croaker is yellow. Perch, on the other hand, is a little fat, with no yellow scales and spots.

The value of cultivation is different. Hairtail is rich in fat, protein, vitamin A, unsaturated fatty acids, phosphorus, calcium, iron, iodine and other nutrients. ? Yellow croaker is high in protein, calcium, phosphorus, iron, iodine and other inorganic salts, and the fish tissue is soft and suitable for digestion and absorption.

Perch is rich in digestible nutrients such as protein, fat, vitamin B2, sugar, inorganic salts, nicotinic acid, niacin, calcium, phosphorus, potassium, zinc, copper, iron and selenium. It has the effects of strengthening spleen and stomach, nourishing liver and kidney, resolving phlegm and relieving cough, has a good tonic effect on people with liver and kidney deficiency, and can also improve symptoms such as weakness of spleen and stomach, dyspepsia and edema. These three kinds of fish can be farmed artificially, and they all have good nutritional value.