Meet a ray and a turtle gliding through a teeming coral reef, spot an octopus hiding in the kelp forest and a shark dashing after a shoal of shimmering sardines. Dare to explore the dark deep where a glowing anglerfish lurks, before meeting a huge blue whale as it rises to the surface. With five fantastic pop ups, this book will take you on an awe-inspiring journey to the depths of the ocean and back again.