In this incredible story, you will learn the secret of dolphin's sleep. Once upon a time, in a deep, enchanting, and vast ocean, there lived a young, spirited, and curious dolphin named Dolly. Her eyes sparkled the way sunlight sparkles on the water's surface, and her sleek, silvery-gray skin gleamed as she swam gracefully through the waves. Dolly was known among her pod for her adventurous spirit and insatiable curiosity.