Salmon and rainbow trout can be identified by four characteristics:

1. Texture and color:

Salmon: high fat content, orange-yellow flesh color, whiter white pattern on the surface, wider lines and blurred line edges. Rainbow trout: Low fat content, thin lines and hard edges, that is, red and white are obvious.

2, thickness:

Salmon: The meat is soft and is usually cut into thick pieces (about .7cm-1cm). Rainbow trout: The meat is hard, so it is chewy, and it is generally cut thin (.3-.5cm).

3. Glossy:

Salmon: Looking shiny with oil. Rainbow trout: It's dim in the light.

4. Taste

Salmon: There is a lot of fat, so it is full of meat and has a feeling of melting mouth. When you chew, you will feel that the meat is constantly squeezing your teeth and mouth. Rainbow trout: It's more chewy, but it's not so fragrant because of less fat.

Extended information:

Salmo salar common name for some salmon, originally referring to Salmon Atlantic salmon. With the development of aquaculture, merchants also refer to Pacific salmon (Oncorhynchus) and other fish as "salmon". Salmon has a flat body, a raised back, sharp teeth, small scales, silvery gray, and orange stripes during spawning. Salmon meat is compact and delicious, pink in color and elastic.

There is a wide and bright red rainbow band in purple and pink along the lateral line of rainbow trout mature individuals, which goes straight to the base of caudal fin, especially in breeding season. Like a rainbow, hence the name. The fish body is spindle-shaped and slightly flattened. There is a fat fin, and the body color is beautiful. There is a brown-red longitudinal belt on the side of the body, which looks like a rainbow. Body shape is flat, mouth is large, oblique crack, end position. The kiss is round and blunt, and the upper jaw has fine teeth.

The dorsal fin has a short base and a small lipid fin behind it. The pectoral fin is medium in size and slightly pointed at the end. The ventral fin is small, away from the gluteal fin. The scales are small and round. The back and the top of the head are blue-green, yellow-green and brown, and the sides and abdomen are silvery white, white and grayish white. Black spots are irregularly distributed on the head, side, back and fins.

References:

Salmon _ Baidu Encyclopedia

Rainbow Trout _ Baidu Encyclopedia