Swedish fish are candy...harder than gummy candies (worms, bears, etc...)... and they are shaped like fish. I found them at my grocery store and
walmart. They came in a yellow bag.
Basically, what I did was make rice crispy treats (rice crispy cereal and melted marshmellows). For one kind, we made bars and topped with the fish. For the others, I made a thin flat piece of rc treat, rolled it around a gummy worm or two, then wrapped that in fruit roll up (like nori around real sushi) and finally cut that into little rounds (like california rolls would be cut).
HTH
Jaci