In italian, crudo means raw. Similar to sashimi, italian crudo is raw fish eaten at the peak of freshness, dressed simply, with olive oil and lemon. It is a way to highlight the finest quality fish you can purchase. This recipe for tuna crudo is a classic italian dish, combining regional flavors such as meyer lemon, olive oil, and basil. You can also make this dish using any fish you might find at a sushi bar, including seabass and halibut. Not only is this recipe delicious and simple, it's also healthy.