I know which was.....Until August this year, Britain's largest freshwater fish was a male carp which weighed 56lb (25 kg) when it died at the age of 32.
Unfortunately named 'Mary' the male fish lived in an angling lake in Middlesex.
It held the British carp record and was the largest fish ever born and bred in this country.He was only 10 inches long when he was introduced to the lake in 1972, but he grew to more than 10 times the size of an average salmon.
He wa somewhat smaller than other freshwater rivals around the world - notably the South American Arapaima which can grow up to 13ft (4m) and weigh 440lb (200kg )