1, preservation method: water-soaked canned tuna is made without adding oil, and the tuna is preserved by soaking in salt water. While oil-soaked canned tuna is preserved by soaking the tuna in oil.

2, different uses: water-soaked canned tuna is used to make salads, sandwiches and other healthy foods because of its low fat content. While oil-soaked canned tuna is more suitable for cooking, which can increase the flavor and texture of the dish.