TOKYO — A solitary sunfish at an aquarium in southwestern Japan lost its appetite, began banging into the side of the fishtank and appeared unwell days after the facility closed last month for renovations. As a last-ditch measure to save the popular fish, its keepers hung their uniforms and set up human cutouts outside the tank.

The next morning, the sunfish ate for the first time in about a week and has been steadily recovering, said Moe Miyazawa, an aquarist at the Kaikyokan aquarium in Shimonoseki.