Prepare large rimmed baking sheet pan by lining with wax paper and generously buttering or spraying with nonstick.

In extra large bowl; combine marshmallows and butter. Microwave 2-2 ½ minutes or until marshmallows have puffed up and almost doubled in size.

Immediately stir in crispy rice cereal.

Transfer mixture to prepared pan and using hands or the bottom of a cup, press evenly into pan.

Refrigerate until cooled. Once crispy treats are firm, carefully remove wax paper and transfer treats to cutting board.

Cut treats into small rectangles (approx 3-4" in length). Form into nigiri sushi shape with hands. This should yield 30+ crispy treats.

Top each crispy treat with a Swedish fish candy. Trim Fruit by the Foot into strips long enough to wrap around each piece of candy sushi. Wrap around crispy treats and fish candies.

Serve.