There is a Discovery channel show called "Mythbusters" where two guys test out urban myths like pop rocks and soda killing someone. Last season they tested the myth of whether goldfish are so stupid that as they circle a tank they can't remember what they saw the last time around. They tried training the fish to prove that they do have memories. One of them (Jamie) managed to train the goldfish to run a maze by signaling them with colored paddles. He had read a book that said that fish can recongize colors. Does anyone know what book that was?