Forget Goldfish Crackers and the actual living, swimming ones. They both, one day, will disappear. The crackers will only last as long as your hunger, and the living goldfish will eventually die (or also last as long as your hunger— or your cat's hunger). But there's one goldfish that can survive the test of time— an origami paper gold fish.
This video shows the steps necessary for folding the origami goldfish. This is a simple, traditional gold fish for which you will only need one sheet of paper. Try folding this one yourself. Use different colored papers and different textured sheets for various fish creations.