A richly illustrated introduction in verse to food chains and food webs in the ocean, written on an upper elementary level. It includes the basic food pyramid "rule of ten", e.g., it takes 200 lobsters to feed 20 octopuses, which will feed 2 sharks. The book is 56 pages (9" x 7" landscape format) and includes four food chain habitats: two in the open ocean, one on a rocky bottom, and one in the cold Antarctic. Scale drawings of familiar objects illustrate the sizes of the marine creatures. The book explains the difference between a food chain and food web. A glossary defines terms such as plankton and algae. The individual color illustrations are all drawn from early (chiefly 19th-century) texts, encyclopedias, and expedition reports.