1. Appearance and body shape: The body of the silver cod is longer and slightly cylindrical, while the body of the freshwater mizuna is more rounded. The silver cod has a larger head with a large mouth slit, while the freshwater mizuna has a smaller head and a smaller mouth slit. In addition, silver cod have larger scales, while freshwater mizuna have smaller scales.

2, habits and habitat: silver cod is a marine organism, living in the deep sea, caught in shallow waters or offshore. In contrast, the freshwater water mizuno lives in rivers, lakes and other freshwater environments, is a freshwater fish.