PreS-Gr 4-Law has taken the traditional folk song and tweaked the words slightly so that it is a vehicle for teaching about the marine food chain, beginning with the shark and ending with seaweed. Back matter includes an explanation of blue holes and of the food chain, a paragraph describing each of the sea creatures featured in the song, and the score. The gouache and collage illustrations picture a bright and sunny underwater world, with vivid shifting shades of blue. A nice addition with a dual purpose.-Grace Oliff, Ann Blanche Smith School, Hillsdale, NJ (c) Copyright 2013. Library Journals LLC, a wholly owned subsidiary of Media Source, Inc. No redistribution permitted.