What is dolphins pin?

Unfortunately, as an AI language model, I cannot access pictures or images. However, dolphins often have a rounded dorsal fin and a sleek body shape designed for efficient swimming. Their skin is smooth and grayish in color, although variations exist among different types of dolphins. They are intelligent creatures known for their social behaviors, communication abilities, and acrobatic displays. Some species of dolphins are considered endangered due to habitat loss, pollution, and hunting practices.