Tahlbooreans were sapient humanoids indigenous to Tahlboor. There were two variants of the species: the blue Troobs and the purple Hobors, who were at constant war with one another. They once had a highly-developed civilization that had created the sky cannon, but a misfire of it had caused them to revert to relative barbarism.
Behind the scenes[]
"Tahlboorean" is misspelled "Tahlboorian" once in The Protocol Offensive.