Urban Myths Debunked : Is it true that goldfish have a memory span of only 3 seconds?
This is a myth … This is one of those urban myths that refuses to die.
There have been various studies disproving this most common held belief. In January 2009, researchers from the Technion Institute of Technology in Israel taught fish to respond to a sound that meant feeding time in captivity. The fish remembered the sound months later having been returned to the wild, returning to a certain spot for feeding.