The crab-eating macaque[1], also called the long-tailed macaque and known in laboratories as the cynomolgus monkey, is a primate monkey endemic to Southeast Asia.
- The body fur of long-tailed macaques is usually gray-brown to red-brown. These colors are always lighter ventrally.
- The face is brownish gray with whiskers on the cheeks. The eyes of these Asian monkeys are directed forward for binocular vision.
- With a flatter nose and narrow nostrils, Crab-eating macaques have shovel-shaped incisors, prominent canines, and bilophodont molars.
- The gray-brown or reddish tail measures 50-60 cm. Crab-eating macaques show sexual dimorphism in their sizes.
- The average weight of males is 4.8-7 kg, and that of females 3-4 kg, about 69% of the average weight of males.
