This book is suitable for children aged 6-12 years. 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! This book explains: how a fish's body is designed to live underwater; how fish swim, breathe, eat, and reproduce; how they defend themselves; life in a tropical reef; unusual fish and fun fish facts; and, dangers to fish.