A whimsical, stylized look at ocean-faring creatures blends its playful approach with a serious theme. McLimans renders various fish, waterfowl, and other sea life in the shape of the numbers 1 through 10. Each subject is either endangered, experiencing population loss, or living in threatened habitats. The graphically striking black-on-blue (counting up from 1 to 10) and blue-on-black (counting down from 10 to 1) images are accompanied by brief facts about the creatures. Additional information about the oceans is provided in “ocean life by the numbers,” “ocean threats by the numbers,” and “our blue planet” pages. This volume will appeal to budding environmentalists as well as lovers of the sea and fans of art and graphic design. (Ages 5–10)