What's next, teaching them to coat themselves in batter and hop inside a fryer?

Call them Pavlov's fish: 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.  LINK