The Sponges of California is an educational, scientific reference manual well-suited for a laboratory environment. The book is full of illustrations and text of the various sponges in California. It is designed for amateurs, neophytes and specialists alike. In this book you will find over 260 pages of interesting information about what sponges are made of, what they do and how they contribute to the ecosystem at large. This book would be a great addition to any teacher’s science tutorial.