"Find out all about scales and how they help salmon swim, stay safe and survive. Discover how scales are different on different fish and how they change as fish grow up."-- Provided by publisher.

Which animals have scales? -- What are scales? -- How do scales protect animals? -- How else do scales help animals? -- Can scales help animals catch their prey? -- How do scales help animals move? -- Do some animals have very special scales? -- How do fish look after their scales? -- How do snake scales grow? -- Scales quiz.