Tabbuts are a greedy, pig-like sentient species native to Third Earth, easily recognised by the single horn protruding from the forehead. They make their living as landlords, collecting rent from the gentler Bolkins and Wolos who live on their territory. Gumla is the most prominent named member of the species, but other Tabbuts appear or are referenced across the series.
Their full debut comes in The Spaceship Beneath the Sands. They are mentioned again in Snarf Takes Up the Challenge, and Tabbut forms are adopted as disguises in The Thunder-Cutter (the ninja) and Mumm-Rana (Lion-O).