The introductory section offers an illustrated guide to the common counts and measurements used for fish identification; a brief explanation of fish phylogeny; and a scientific key to help identify the fish families in Texas.

The book includes species accounts of native and introduced fishes found in the freshwaters of Texas. Each account covers the physical characteristics, habitat, and distribution of the fish, with additional comments of interest or importance to its life history and conservation status. With the largest collection to date of color photographs, including various color phases (breeding and non-breeding colors), the book also includes range maps within the species accounts. The closing pages of the book feature a glossary and reference section.

In a time when the state's water resources are beset by issues growing in both number and complexity, this book provides information for professionals and policy makers. It also contributes to the natural history education of the public.