The mammal known to live in water and often called a "sea cow" is the manatee. Manatees are large, slow-moving herbivorous marine mammals found primarily in shallow coastal waters, rivers, and nearshore habitats. They are known for their gentle nature and large size, typically reaching lengths of 10 to 13 feet. Manatees are social animals that often congregate in warm waters, especially during the colder months. Unfortunately, they face threats from habitat loss, boat strikes, and other human activities, making conservation efforts critical for their survival.