This book is the second of two volumes that cover the entire fish fauna of the Gulf of Mexico. It includes the orders Scorpaeniformes, Perciformes, Pleuronectiformes, and Tetraodontiformes. Keys and descriptions are provided for the families, which are arranged phylogenetically, and for the species, which are arranged alphabetically, described (including distribution and life history), and distinguished from similar species. All but a few species are illustrated. The volume also includes a biogeographical synopsis of the fishes of the Gulf of Mexico.