Fresh yellow croaker's eyeball is full and prominent, and the cornea is transparent and elastic; The eyeball is not prominent, the cornea is shriveled, and the eye is slightly turbid or bleeding;
The eyes of stale yellow croaker collapse or atrophy, and the cornea atrophy or rupture.
2. Look at its gills.
The gill filaments of fresh yellow croaker are clear and bright red, and the mucus is transparent, which has the salty taste of marine fish or the earthy smell of freshwater fish, and has no peculiar smell;
The gills of stale yellow croaker are brown or grayish white, with filthy mucus and unpleasant rancid smell.
3. Look at the fish skin.
Fresh chilled yellow croaker has complete epidermis, transparent mucus, bright scales and close to the fish body, and is not easy to fall off;
The skin of stale yellow croaker is dull, and there are dirty mucus and dull scales on the surface, which are separated from the skin.