Apparently all 19 dolphins have developed potbellies and are too out of shape to perform aquatically.

“They started failing to hit jumping targets and keep upright while treading water. We were puzzled by their poor performance, and then we noticed they looked rounder.” - Haruo Imazu, Kinosaki Marine World.

Aquarium workers have measured the dolphins and found that all had gained weight over the summer, some up to 22 pounds.