Something about this just doesn’t seem fair. 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 when they hear the signal.

The key question for fish farmers: How many fish will actually return, and how many will be lost to predators or simply swim away?