"An introduction to marine invertebrates and their physical characteristics, life cycle, behaviors, and adaptations to various habitats. Features include diagrams, fun facts, glossary, resource list, and index"--Provided by publisher.

What are mollusks? -- Snails -- Bivalves -- Octopuses and squids -- What are crustaceans? -- What are features of crustaceans? -- Lobsters and crabs -- Shrimp and krill -- Barnacles -- What are echinoderms? -- Starfish and sea urchins -- Sea cucumbers and sand dollars -- What are cnidarians? -- Corals -- Jellyfish -- Portuguese men-of-war -- What are sponges? -- How are ocean invertebrates endangered? -- Protecting ocean invertebrates.