One piece of tuna sashimi (approximately 1 ounce of protein with no rice) has about 35 calories. Make it a piece of tuna nigiri (with rice) and it's about 61 calories. A typical sushi roll is prepared with one cup of rice, which amounts to three servings of carbs and 240 calories.
 
ORIGIN: found in tropical and subtropical oceans around the world, including the waters around the U.S. Pacific Islands and off southern California.