As of 2023, the name is unofficial and over the years,[when?] has not formally been used to refer to the Blue Mountains Line service run by NSW TrainLink.
History
In the 19th century, a train from Sydney to Penrith was driven by John Herron, a large man with the nickname of The Big Fish.[1] The name transferred to the train itself and it remains in use today. The name has been applied to various Blue Mountains services over the years and today is a commuter service from Lithgow to Sydney operated by V sets.
Following electrification of the Main Western line in 1958, it was operated by U set single-deck electric trains. These in turn were replaced by double-deck V sets.
It is complemented by another service, The Chips and used to also run with The Summit and The Heron.[2]
^"MORE ABOUT "THE FISH"". Lithgow Mercury. New South Wales, Australia. 7 November 1945. p. 3 (TOWN EDITION). Retrieved 28 May 2016 – via National Library of Australia.