"Everyone at school is excited for a trip to the Shallows. Pearl and her friends Echo and Splash can't wait to see what the ocean is like across the Salty Sea. But Flip wants to do something more daring than learning about algae! So when some older dolphins slip away to go exploring, Flip sneaks after them. He's determined to prove he's just as brave as they are. But he soon finds himself in unfamiliar waters. Can Pearl and her friends rescue Flip before he's lost at sea?"--Page [4] of cover.