Do you know why whales sing? Or why pufferfish puff up? Or how coral changes color? You will after you read this book!From the creators of the popular podcast But Why comes a new illuustrated nonfiction series for kids answering all their most curious questions! Featuring tons of sidebars, illustrations, and real questions from real kids, this book will keep young readers engaged as they dive into the pages and the deep blue sea!

Do you know why whales sing? Or why pufferfish puff up? Or how coral changes color? You will after you read this book!From the creators of the popular podcast But Why comes a new illuustrated nonfiction series for kids answering all their most curious questions! Featuring tons of sidebars, illustrations, and real questions from real kids, this book will keep young readers engaged as they dive into the pages and the deep blue sea!