Description: "Dive into this compelling, content-rich nonfiction picture book and you'll find yourself on an underwater adventure, a marine mission past reefs, beyond the near shore sea floor, down, down, through the sunlight layer, the twilight layer, the midnight zone--all the way (as in seven miles!) down to the bottom of the ocean. Layer by layer, readers will get to know all the mysterious sea life that dwells in the deepest depths while finding out just how interconnected--and crucial--the ocean's ecosystems really are"-- Provided by publisher.
Review Quotes: "An evocative and engaging book that turns deep-sea science into a thrilling exploration." -- School Library Journal