German police called to a break-in at an apartment in the northern town of Itzstedt found the intruder still on the premises and hiding under a kitchen cabinet.
The "cat burglar" had somehow crawled into the ground-floor of the apartment, broken window blinds, torn down drapes and trashed furniture.
Police also found fish and fish remains from a broken aquarium scattered around the apartment, said Julika Reinhardt, spokesman for the police in the town north of Hamburg.
Two officers finally found the offender, a cat, hiding under a kitchen cabinet but the heavyweight male resisted arrest, biting one officer in the thumb before they both managed to overpower it.
Reinhardt said the cat, wearing a name tag, was returned to its owner who would have to pay for the damage.
"No one knows how the cat broke in," she said. "But the damage was considerable."