Lake Oku clawed frogs are small, with males growing to an average of 28–31 mm and females 32–36 mm. The name results from the claws at the ends of its two hind feet. Its back is brown, the belly is speckled black on an orange background. These frogs also have an unusually high number of chromosomes, 12 sets. It is fully aquatic, never observed to come out of the water.
