The species had two known sexes: male and female. Members of the species were small in size, roughly comparable to that of a human child, with green skin, large eyes and long pointed ears. Their three-fingered hands ended in claws. The species were suggested to mostly have a carnivorous diet, with a preference towards catching and devouring live amphibians whole. Their ears were expressive, curling and unfurling in accordance with their emotions.
Members of the species were capable of growing thin hair, with shades varying from auburn to white being documented. The species had a very long life expectancy, spanning at least several centuries; Yoda lived nearly a thousand years before dying of old age. and they aged very slowly, remaining in infancy for at least fifty standard years. Even at this stage of life, certain Force-sensitive individuals of this species could use Force powers such as telekinesis and Force healing; they were also capable of complex thought processes, and could understand speech and communicate via the Force at this age. Despite their slow aging for the first five decades of life, members of the species reached maturity by their hundredth year, as exemplified by the Jedi Yoda, who began training other Jedi when he was about one hundred years old.