Washed tuna refers to specially treated tuna. The treatment method includes removing the fish head, bones and skins, then cutting the fish into small pieces and washing them with clear water. This process aims to remove excess blood, impurities and peculiar smell from fish, and make tuna look fresher and whiter. Washed tuna is usually used to make raw dishes such as sushi and sashimi, and can also be used to make canned food and salads. Compared with untreated tuna, washed tuna is cleaner, healthier and more delicious, so it is favored by consumers.