Ocean explores the sea creatures that live at different depths, from the organisms that live in rock pools and the shallows to the strange animals that lurk in the abyss, as well as examining how pollution and climate change are affecting the oceans' ecosystems. Each spread features bold, colorful, and eye-catching illustrations of the different animal and plant species, plus easy-to-digest, bite-sized factoids about the creatures. A ruler running down the side of each spread highlights the different depths, and a magnetic clasp shows the entire ecosystem from top to bottom.