The ten most delicious sea fish: yellowtail, scallop, pomfret, flounder, eel, cod, fallfish, otoro, sea bass and tuna. Sea fish are fish that live in the sea and die when they come to fresh water. The reason is: seawater density, high pressure, sea fish into fresh water will die is because the blood pressure of sea fish adapted to the sea water pressure, into the freshwater after the freshwater pressure is small, the blood pressure of sea fish over the pressure of the water leading to the death of blood vessels burst.

Sea fish is delicious, but because it can not survive in fresh water, so we buy sea fish is often dead, which will increase the difficulty of picking fresh sea fish. Usually when you buy sea fish, you have to look at the eyes first. If a live fish is preserved immediately after death by cooling it down with crushed ice, the crystals of the eyes will glow. As a result, the eyes of fresh marine fish are clear and transparent, with the eyeballs intact and full, and slightly convex outwards. On the contrary, if the eyes do not bulge out, the cornea is wrinkled and cloudy, and the blood inside the eyes is red, it means that the fish is not fresh. Then touch the body of the fish to see if it is stiff. After death, the muscles of the animal will sequentially enter the process of post-mortem stiffness, softening and corruption. Therefore, the body of the stiff sea fish is fresher.

Finally smell the gills seawater flavor, through the smell to determine whether the fish is fresh. If you can do it, it is recommended to open the gills and smell the flavor. The gills should have the salty flavor of sea fish, and no strange odor. At the same time, fresh fish gills are bright red, gill filaments are clear; and not fresh fish gill filaments are broken, the color is gray-red or gray-purple, the smell is not good.