A method for feeding farmed fish by using au automatic feeder (20), whichsupplies a feed to the farmed fish in accordance with a preset feedingschedule, and afeed-demand sensor (22), which detects a demand for the feed by the farmedfish,characterized in that the feed-supply by the automatic feeder (20) iscontrolled on thebasis of the detection results from the feed-demand sensor (22).