Definition
Enhydra refers to the genus of sea otters, with *Enhydra lutris* being the only living species. These marine mammals are uniquely adapted to life in the ocean, lacking blubber but possessing incredibly dense fur for insulation. They are found along the Pacific coastlines of North America and Asia. Sea otters are known for their playful behavior and their habit of using tools, like rocks, to crack open shellfish. Their role as a keystone species helps maintain the balance of kelp forest ecosystems. They face threats from pollution and habitat loss.