Seafood can be eaten overnight, but it is best not to eat. Overnight seafood not only which the nutrients have been largely lost, the taste will also become worse, it is best to eat within 1-2 hours after cooking. If you want to eat overnight seafood, be sure to heat thoroughly before eating, and do not eat a lot, or may be uncomfortable, when buying seafood to try to pick fresh, and bought back as soon as possible after the cooking, do not put a long time at room temperature. Seafood is rich in protein, is very easy to corrupt food, if placed for a long time, may also produce harmful substances. Seafood shopping tips: 1, buy frozen sea fish, should pay attention to observe the fish eyes, fish belly and fish scales. Fish eyes clear and bright, fish belly intact without rupture, fish scales intact without shedding the frozen sea fish is relatively fresh. Frozen sea fish is not fresh, fish eyes will often be too long in stock or dried out and become cloudy, collapsed, fish belly will be deterioration of the fish body and breakage. 2, need to pay attention to in the purchase of cutlass fish, yellow croaker, but also pay attention to the color of the fish body, cutlass fish should be chosen to be silvery-white, while the fish body is a yellowish-white yellow croaker is more fresh. If you can see the gills of frozen sea fish, you can also identify its freshness, such as gills black or white, or excessive bright red, may not be fresh, fresh frozen sea fish gills should be natural dark red.