Some Zoo fans have asked us why our otters appear to have mustaches! African spotted-necked otters like Hasani and Pfeifer are named for their white markings on their muzzles, neck, and chest. These natural white markings do make it look like our otters have mustaches! You can actually use these markings to tell our two otters apart from each other. Hasani has a wider, thicker lip marking, while Pfeifer has a smaller upper lip spot.