Classification: Focus on: Fish shows children how to identify and group fish according to their characteristics. It answers questions such as what is a fish? Where do fish live? What do fish eat? And how do fish move about? Along with many others.

The book looks at fish from sharks and piranhas to pufferfish and catfish and their young, as well as some more unusual amphibians such as lampreys and cleaner wrasses. It also offers advice on keeping fish as pets.

The book also contains a useful scale to demonstrate the size of many fish in comparison to a human hand or an adult man, along with a topic web, a glossary and some suggestions for extension activities.

Other titles in the series include Classification: Focus on: Birds, Classification: Focus on: Insects, Classification: Focus on: Reptiles and Classification: Focus on: Mammals.