48 pages. 7,253 words. Middle Grade. Nonfiction. Each spread has a topic with about 300 words and 2 to 5 pictures. Photographs.
About mollusks generally: Mollusk types, body parts, habitat, evolution, locomotion, senses, feeding, predators, breeding, interaction with people and animal classification. Deeper looks at snails, gastropods, bivalves, octopus, squid, chitons, giant mollusks, weird mollusks. Includes a glossary.
Definitely geared to 4th -6th grade with an additional interest in the animal kingdom. Beautiful photography. If you are a beach person you will be interested in seeing the animals alive and attached to the shells that you find abandoned on the sand. It answers things in detail so this would be the go-to book for specific information on movement and close-up views of eyes and feeding.