This guide primarily uses illustrations to support the identification of 29 families and 134 species of bony fishes in Volta Lake, offering a practical tool for field workers. It begins with a general section on technical terms, followed by an illustrated guide to the families, and then an annotated, illustrated list of key species, including FAO names, size, fishing gear, and habitat. Species synonyms are noted where applicable. A composite list of local names is also included to enhance the guide's usefulness for fishermen.