Fig. 267. Pristella riddlei

Title: The complete aquarium book; the care and breeding of goldfish and tropical fishes
Year: 1936 (1930s)
Authors: Innes, William T. (William Thornton Innes), 1874-1969
Subjects: Aquariums; Goldfish
Source book page: https://archive.org/stream/completeaquarium00inne/#page/n283/mode/1up
Source: https://commons.wikimedia.org/wiki/File:The_complete_aquarium_book;_the_care_and_breeding_of_goldfish_and_tropical_fishes_(1936)_(20049227934).jpg

The X-ray fish or X-ray tetra (Pristella maxillaris) is freshwater fish species with translucent body. It is a widely distributed and adaptable fish, found in the Amazon and Orinoco basins, as well as coastal rivers in the Guianas in both acidic and alkaline waters.