Found a little video (on an Dutch circus website) of trained gold fish performing formation swimming:
http://www.circus-web.nl/siteimages/video/goudvissen.wmv
Klaas Bil
Call me cynical but I reckon they’ve got magnets stuck to their undersides. Suspiciously shallow water so the fish are dragging along the bottom.
Are you seriously suggesting that there are people out there who would perpetrate hoaxes over the Internet???