No.

The difference between the two:

1. Rainbow trout is a freshwater fish, while salmon is a saltwater fish.

2. The meat of salmon is tender and has a special aroma. It is more suitable for making sashimi than rainbow trout.

Rainbow trout meat has no aroma.

3. Salmon can reach more than one meter in length, while rainbow trout is obviously much smaller.

Similarities:

Both fish belong to the Salmonidae family and are both cold-water fishes.