Goldfish is a crafting ingredient that was added in the June 19, 2012 Patch.
Equipping the Eliminating The Impossible set will change the Goldfish description to "Think of the", with random characters removed (the characters removed being different for different players), which is a part of a quote from the "The Adventure of the Copper Beeches" short story, part of The Adventures of Sherlock Holmes collection. When combined with the other items added in the June 19, 2012 Patch, the full quote reads "Think of the deeds of hellish cruelty, the hidden wickedness which may go on, year in, year out, in such places, and none the wiser."
Durning the "How to make a gun" video You can spot for a second that the maker listening to a song at youtube named "Fort Knox" by Goldfish. Beside that, Fort Knox was mentioned in a previous post at the blog, mentioning "They're going to have to melt down Fort Knox to make all the Oscars we're going to win". The creator later told the popular web forum Facepunch, that the incidence was a coincidence.
June 19, 2012 Patch
- [Undocumented] The Goldfish was added to the game.
June 20, 2012 Patch