CaO#/& 'admiin




 S. J. Walsh and W.J. Lindberg*
















*Graduate student, Department of Zoology and the Florida State Museum; and Assistant Professor Aquaculture Extension Specialist, Depart-
ment of Fisheries and Aquaculture, Institute of Food and Agricultural Sciences; University of Florida, Gainesville, FL 32611.
Cover illustration adapted by Darrae Norling from Atlas of North American Freshwater Fishes, North Carolina State Museum of Natural History.
Graphic design by Kelly Hancock.