No bait! Fish may respond to sound
Scientists are testing a plan to train fish to catch themselves by swimming into a net when they hear a tone that signals feeding time. If it works, the system could eventually allow black sea bass to be released into the open ocean, where they would grow to market size, then swim into an underwater cage to be harvested when they hear the signal. Previous experiments have used sound to train a fish to feed - similar to what Russian scientist Ivan Pavlov did in his famous dogs that salivated at the sound of a bell, expecting food. In Japan, scientists have used sound to keep newly released farmed fish in certain areas, where they could be caught in traditional ways. But no one has ever tried to get fish to leave and return to an enclosure where they can be scooped up. Simon Miner, a research assistant at the Marine Biological Laboratory at Wood's Hole, said the first objective was to see if the fish could truly be trained. He got his answer after keeping the fish in a circular tank, then sounding a tone before he dropped food in an enclosed "feeding zone" within the tank that the fish could enter only through a small opening. Researchers played the tone for 20 seconds, three times a day, for about two weeks. Afterward, whenever the tone sounded, "you have remote-control fish," Miner said. "You hit that button, and they go into that area, and they wait patiently," he said. Some fish forgot after five days. Others remembered as long as 10. Miner said the strength of memory seems tied to how long the fish are trained.

Read more here: http://news.yahoo.com/s/ap/20080326/ap_on_sc/pavlov_s_fish

Mine says 'here fishy fishy fishy, here fishy fishy fishy'

I assume you can record a message on your's Les.