By Alexander Kaufman; illustrated by Mariana Rodrigues

This oversized book is both beautiful and informative. This book begins with the important aspects of many watery worlds and defines each: salinity, density, light penetration, currents, pressure, waves, water acidity, and tides & oxygen concentration. 15 different water ecosystems are highlighted from all parts of the planet. Within each, 8-10 species are illustrated and discussed, as well as the importance of each unique type of watery ecosystem. Each ecosystem features a two-page spread of the ecosystem “in action” followed by 2 pages of information about specific species. While the reader may never see the fast-moving freshwater of the Amazon River in South America, they can certainly see similar ecosystems near their own homes.  The illustrations are gorgeous and are worthy of time spent just swimming around the pages. This book would be a great addition to a science class involved in water quality testing or any school library where water issues are studied. This is a highly recommended picture book for older audiences since the text is geared toward older students!