No fugitive can run forever. More than two months after it escaped from his pen in a Japanese aquarium, Penguin 337 is back behind bars.

Two Tokyo Sea Life Park keepers caught the runaway yesterday evening under a bridge over the Edogawa river in Ichikawa, on the north side of Tokyo Bay, the Agence France Presse reported.

The 1-year-old Humboldt penguin, known by its park ID number 337, had been living free since early March, when it tackled a 2-meter fence to make it into the waters of the Edogawa.

Keepers at a Japanese aquarium have appealed to the public to help them track down an escaped penguin, last seen headed for Tokyo Bay.

Tokyo Sea Life Park declared the 1-year-old Humboldt penguin missing yesterday, the Japan Times reported. The alarm was raised by a sharp-eyed official at a nearby wildlife park, who spotted the – ahem – jailbird making a break for it down the Old Edogawa river.