List of ContributorsPreface Melvin L. Warren, Jr., and Brooks M. BurrAcknowledgmentsChapter 14 Characidae: Characins Norman Mercado-Silva, Claudia P. Ornelas-García, Juan Jacobo Schmitter-Soto, Nicholas J. Gidmark, and Andrew M. SimonsChapter 15 Ictaluridae: North American Catfishes Brooks M. Burr, Melvin L. Warren, Jr., and Micah G. BennettChapter 16 Ariidae: Sea Catfishes Matthew R. Thomas and Ricardo Betancur-R.Chapter 17 Heptapteridae: Seven-finned Catfishes Matthew R. Thomas and Mark Henry SabajChapter 18 Osmeridae: Smelts Robert L. Hopkins II and Melvin L. Warren, Jr.Chapter 19 Esociformes: Esocidae, Pikes, and Umbridae (Mudminnows) Frank H. McCormick, Terry Grande, Cheryl Theile, Melvin L. Warren, Jr., J. Andrés López, Mark V. H. Wilson, Roger A. Tabor, Julian D. Olden, and Lauren M. KuehneChapter 20 Percopsidae: Trout-perches Brooks M. Burr and Melvin L. Warren, Jr.Chapter 21 Amblyopsidae: Cavefishes Ginny L. Adams, Brooks M. Burr, and Melvin L. Warren, Jr.Chapter 22 Aphredoderidae: Pirate Perches Brooks M. Burr and Melvin L. Warren, Jr.Chapter 23 Gadidae (Gadinae and Lotinae): Cods and Cuskfishes Peter B. BerendzenChapter 24 Mugilidae: Mullets Steven L. PowersChapter 25 Atherinopsidae: New World Silversides Kyle R. Piller and Clyde D. BarbourChapter 26 Beloniformes: Belonidae (Needlefishes) and Hemiramphidae (Halfbeaks) Bruce B. Collette and Stephen J. WalshChapter 27 Rivulidae: New World Rivulines Ann M. Uzee O'Connell, Martin T. O'Connell, and Anthony A. EchelleChapter 28 Profundulidae: Middle American Killifishes Mollie F. Cashner and Anthony A. EchelleChapter 29 Goodeidae: Goodeids Shane A. WebbChapter 30 Fundulidae: Topminnows Robert C. Cashner, Jacob Schaefer, Melvin L. Warren, Jr., Anthony A. Echelle, Fernando Galvez, and Michael J. GhedottiChapter 31 Cyprinodontidae: Pupfishes Anthony A. Echelle and Alice F. EchelleChapter 32 Poeciliidae: Livebearers Michael J. Ghedotti, Matthew P. Davis, and Anthony A. EchelleLiterature CitedIndex of Scientific NamesGeneral Index