1. Cod is prolonged and laterally compressed, cylindrical, with the back of the body dark blue-gray or green-gray, and the belly gray or light-colored.

2, oilfish for the round lip, the body is slightly longer, rounded in front, the back of the lateral compression, the back of the head into a curved shape, the upper part of the body for the black or greenish-black, grayish-white abdomen, the fins black, the vast majority of scales on the side of the body with a black edge from the gill holes after the pectoral fins in front of the black patches of the coarser United States into a large black spot.

Two, scales

1, cod scales are smaller, there are small silver dots on the body, lighter flesh color.

2, oilfish scales medium large, abdominal scales smaller, and trapped under the skin.

Three, feel

1, cod thawed after the skin is very smooth, like a mucus membrane.

2, oil fish is relatively rough, silver cod in the sale does not scrape the scales, but the oil fish scraped scales sold.

Four, meat color

1, cod fish segment skin whitish or grayish white, lighter color, delicate meat.

2, oil fish skin is gray-black, darker, with a grid, the meat is hard and rough, oil fish meat can be found in yellow when you look closely.

Cod fish fat contains a variety of amino acids necessary for the development of children, the ratio of children's needs is very similar, and easy to be digested and absorbed by the human body, but also contains unsaturated fatty acids and calcium, phosphorus, iron, B vitamins and so on. Cod meat is very delicate, like salmon to dip horseradish eaten raw, with a unique fragrance and fresh flavor, very suitable for babies to eat. Oil fish containing wax esters, difficult to be digested by the body, will accumulate in the rectum, gastrointestinal function is weak, try to eat less oil fish.