Battleship Sushi: Finger sushi that's topped with very loose or finely chopped ingredients, such as salmon roe or spicy guacamole. These luscious toppings would fall off the rice if it weren't for a tiny collar of nori that's wrapped around the rice ball. In the process, the rice ball takes on the look of a tiny battleship. The rice ball used in battleship sushi is the same shape rice ball used in finger sushi, made by hand or with a mold.