When the sunfish began looking unwell days after the aquarium closed on December 1 for a six-month renovation, its keepers suspected digestive problems, gave it less food and visited the fish tank to ...

An aquarium in Japan closed Dec. 1 for renovation work, much to the apparent dismay of a lone sunfish. It missed people and stopped eating.

Within a few weeks of closing for renovation, their 30-plus kilogram ocean sunfish began exhibiting strange behavior.

To create the illusion of people observing the fish, the staff members printed cardboard cut-outs of visitors wearing clothes ...