Krill constituted tiny crustaceans inhabiting water in substantial populations. Within the oceans of the planet Kamino, they acted as a significant food resource for the semi-aquatic aiwha species, which possessed baleens inside their mouths for the purpose of straining krill from the surrounding seawater. Upon the Sorgan world, a secluded village cultivated freshwater krill through farming, employing them in the creation of the beverage known as spotchka.
The initial reference to Krill within the present Star Wars canon occurred within the 2017 reference publication, Star Wars: The Visual Encyclopedia, authored by Adam Bray, Tricia Barr, and Cole Horton. Prior to this, they had been mentioned within the Star Wars Legends timeline, specifically in the 2001 video game Star Wars: Galactic Battlegrounds.
Krill debuted visually within canon in "Chapter 4: Sanctuary," an episode belonging to the first season of The Mandalorian, a television series available on Disney+. This episode was broadcast on November 29, 2019.