Mangkhut, a mammal of the genus Mangkhut in the monkey family of the primate order. The mountain monkey is the most vicious and largest monkey, with a body length of over 80 centimeters and a height of over 1 meter when standing. Its face is brightly colored and is known as the "big flower face" among monkeys. The mountain demon has a large and long head, resembling a ghost, hence its name. Mangkhut is mainly distributed in the southern part of Sana River in Cameroon, Bioko Island in Guinea, Gabon, and Congo in Africa; It inhabits tropical rainforests and sparse forests on tropical grasslands, as well as rocky forests, corridor forests, riparian forests, agricultural land, flooded forests, and riverbeds in tropical grasslands. The mountain demon has a very high intelligence and is one of the smartest monkeys.

The Japanese macaque is a short tailed monkey that can grow up to 70 centimeters (28 inches) in length. It has a similar appearance to the Japanese macaque, but lacks the bright blue and red colors on its face. It has a high gender dimorphism in weight, with males weighing up to 20 kilograms (44 pounds) and females weighing up to 12.5 kilograms (28 pounds). The overall color is dark gray brown. Mature male has a pink lower lip, a white chin, a dark gray to black face, and a raised groove on the nose. The buttocks are pink, light purple, and blue. Female macaques do not have a pink chin.