A pylchyk is a type of animal lifeform kept as livestock on the planet Bajor. In 2376, Gavi, a preschool teacher aboard Deep Space 9, showed his students an illustration of a pylchyk. (DS9 - Mission Gamma novel: Twilight) Rebecca Jae Sisko had pictures of pylchyks on a pair of pajamas she wore in 2381. (ST - Typhon Pact novel: Rough Beasts of Empire) Rebecca wanted to write about the pylchyk for a report to be presented to the school on the USS Robinson in 2385. Her writing partner Elent Dorson wanted to write about the Denebian slime devil. (ST - The Fall novel: Revelation and Dust)