Philip A. Hastings is Professor of Marine Biology and Curator of Marine Vertebrates at Scripps Institution of Oceanography, University of California, San Diego. His studies include the systematics and phylogeny of fishes, marine biogeography, ecology and behavioral evolution of fishes, and marine conservation biology.H. J. Walker, Jr., is a Senior Museum Scientist at Scripps Institution of Oceanography, University of California, San Diego. His research and interests include the taxonomy, systematics, and zoogeography of marine fishes and the observation of these fishes in their natural environ...