American goldfish breeders were particularly interested in breeding blue goldfish in the first decades of the 20th century. The “blue” was usually either a deep navy, or a pale bluish-violet, as seen here, from Aquatic Life (June 1917).
Featured on PDR in the essay Propagating Propaganda: Franklin Barrett’s Red, White, and Blue Liberty Bond Carp
Toward the end of World War I, as the US peddled hard its Liberty Bonds for the war effort, goldfish dealer Franklin Barrett bred a stars-and-stripes-colored carp: a living, swimming embodiment of patriotism. Laurel Waycott uncovers the story of this “Liberty Bond Fish” and the wider use of animals in propaganda of the time.