Fish are smarter than most people think!
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The fish are trained using positive reinforcement rather than punishment, and the book stesses the importance of keeping your fish healthy and happy.
I couldn't resist ordering The Fish School E-Book, which shows how to train your fish to do these tricks (including instructions for making the necessary equipment), and also cites fascinating research about fish intelligence. You can also buy ready made fish training equipment at the Fish School website, if you prefer.
I'll be testing the Fish School methods on Red Licorice, and my landlords' goldfish, Queenie, Glitter, Freckles, and Prince Charming.
Of course, regardless of how intelligent fish are, they are creatures with feelings who should be treated kindly. At my store, Compassion Fashion, I offer two fish-rights designs: Bettas Deserve Better and Please, Don't Eat Fish.
For more information about fish, please see PETA's site, FishingHurts.com.