Genus Nasalis refers to a group of primates that have a unique physical characteristic - an elongated, fleshy nose. The most commonly known member of this genus is the proboscis monkey, which is found in Borneo. Another synonym for Genus Nasalis is the "long-nosed monkey." This name accurately describes the defining feature of this primate group. Some also refer to them as the "big-nosed monkey," "snub-nosed monkey," or "monyet belanda" in Indonesian, meaning "Dutch monkey" due to their distinct facial feature. While the Genus Nasalis may have a distinctive physical trait, they are also unique in their social behavior and habitat preferences, making them a fascinating species to study.