Body covering used for survival irrawaddy dolphins?

Irrawaddy dolphins have a smooth, thick layer of skin that helps them maintain body temperature and provides protection against environmental factors. Their skin is typically gray or bluish in color, which aids in camouflage within their natural habitats of coastal and freshwater areas. This body covering also assists in reducing drag while swimming, enhancing their agility and efficiency in navigating through water. Additionally, the skin's ability to heal quickly is vital for their survival in the wild.