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Hoix were a race of omnivorous creatures.
In height, Hoix were somewhere between 6'3" and 6'4". Hoix had brown skin, a head that looked like an egg, sharp teeth, claw-like fingers and exposed gums. Hoix couldn't speak; only capable of growling and roaring.
Files in the Torchwood Institute suggested that the Hoix lived to eat, and one Hoix specimen apparently liked to eat everything. Owen Harper noted how unintelligent they appeared to be. (TV: Exit Wounds) The Doctor was aware of this and also of what effects hot chemicals had on the Hoix. (TV: Love & Monsters)