The shark first appeared on 9 August 1986.  Bill Heine, a local radio presenter who still owns the house, has said "The shark was to express someone feeling totally impotent and ripping a hole in their roof out of a sense of impotence and anger and desperation... It is saying something about CND, nuclear power, Chernobyl and Nagasaki".
The sculpture, which is reported to weigh 440lbs (200 kg) and is 25 feet long, and is made of painted fibreglass, is named Untitled 1986 (written on the gate of the house). The sculpture was erected on the 41st anniversary of the dropping of the atomic bomb on Nagasaki. For the occasion of the shark's 21st anniversary in August 2007, it was renovated by the sculptor, following earlier complaints about the condition of the sculpture and the house.

Created by sculptor John Buckley, the shark was controversial when it first appeared. Oxford City Council tried to have it taken down on grounds of safety, and then on the ground that it had not given planning permission for the shark, offering to host it at the local swimming pool instead, but there was much local support for the shark.
Eventually the matter was taken to the central government, where Tony Baldry, then a minister in the Department of the Environment, who assessed the case on planning grounds, ruled in 1992 that the shark would be allowed to remain as it did not result in harm to the "visual amenity".  (I wonder what that means?)