CATDOLL : CATDOLL: The difference between black and white skin of croaker

You are talking about the color difference of turbot, which represents different species.

The light brown or white fish is turbot, while the black fish is halibut. The halibut is very similar in appearance to turbot, which makes many people easily make mistakes when buying it. Turbot, also known as turbot, is a fish with high nutritional value and economic value. The fish meat is rich in gelatin, which has the effect of moisturizing the skin and beautifying the skin. Regular consumption can also nourish the kidneys and brain, nourish the body and improve the body's immunity.

It is relatively simple to distinguish between turbot and haploid. The body of turbot is flat and almost round, while haploid is flatter. Moreover, the color of turbot is lighter, mostly light brown, while the color of haploid is darker, almost black. When buying turbot, you can judge the freshness of turbot based on its eyes, gills, and fish meat. The eye side of fresh turbot is bluish brown, while the eyeless side is white. Moreover, the fish's eyes are full and protruding, and the cornea is transparent and clear. If the eyeball is not protruding, the cornea is wrinkled, or there is blood in the eye, it means that the turbot is no longer fresh. The gill filaments of fresh fish are bright red, the mucus is transparent, and it has the salty smell of marine fish or the earthy smell of freshwater fish. The gills of stale fish are dark gray-red or gray-purple, and the mucus emits a fishy smell. The meat of fresh turbot is firm and elastic, and the depression disappears immediately after finger pressure, and there is no peculiar smell. The meat of stale turbot is slightly loose, the depression disappears slowly after finger pressure, and it has a fishy smell.