Tropical Thursdays #15Here’s your daily dose of Environmental Facts!Discovery DoseApr 13, 20233ShareThe ocean's dolphins use a complex system of clicks and whistles to communicate with each other, and are known for their playful behavior.Loading...Help us spread the knowledge by sharing our content with your favorite people!ShareIf you haven’t already, join thousands of discoverers who are becoming smarter every day!SubscribePreviousNext