Candy Sushi is not restricted to simple sushi rolls. You can also make fish-topped "nigiri" sushi. To make this type, repeat Step #1 by melting 2 tbsp butter and 2 cups mini marshmallows, and adding 3 cups crisped rice cereal.
Press the cereal mixture into the prepared baking sheet, but do not press it as thinly as before. It should be about ¾ inch thick once pressed into the baking sheet. Cut the candy into rectangles about ¾ inch by 1.5 inches. Place a candy fish (such as a Swedish fish) on top of each rectangle.