What Is a Fish? (Science of Living Things (Paperback))

There are over 25,000 different species of fish in the oceans, lakes, and rivers of the earth. Some fish even breathe air and can live on land! Suitable for children aged 6-12 years, this book explains: how a fish's body is designed to live underwater; how fish swim, breathe, eat, and reproduce; how they defend themselves; and, other topics.