Cut entire sheet of Party Potato Rolls in half and flatten both sides with a rolling pin. Arrange rolls on a baking sheet and bake in a 350 degree F oven for 3-4 minutes, or until slightly dried out but not toasted.
Melt butter in a saucepan over medium heat. Add mini marshmallows and stir until melted and smooth.
Pour marshmallow spread onto the toasted party roll sheets and spread out evenly.
Distribute a few drops of blue gel food coloring atop the marshmallow spread. Using a toothpick or skewer, swirl around the food coloring to form a pattern resembling ocean waves.
Top rolls with your choice of toppings, such as shark or fish gummies, sprinkles, etc.
Cut apart rolls (12 per sheet) and enjoy!