What is the body covering of bottlenose dolphins made of?

The body covering of bottlenose dolphins is made of skin. Dolphin skin is smooth, thick, and elastic. It is made up of multiple layers, including a layer of epidermis that contains cells that produce melanin, which gives dolphins their color. The skin also contains a layer of dermis that contains blood vessels, nerves, and collagen fibers that provide strength and flexibility. The outermost layer of skin, called the stratum corneum, is composed of dead cells that protect the dolphin from the environment.