Pt. 1: Introduction. The science of ichthyology ; Systematic procedures -- Pt. 2: Form, function, and ontogeny. Skeleton, skin, and scales ; Soft anatomy ; Oxygen, metabolism, and energetics ; Sensory systems ; Homeostasis ; Functional morphology of locomotion and feeding ; Early life history ; Juveniles, adults, age, and growth -- Pt. 3: Taxonomy, phylogeny, and evolution. "A history of fishes" ; Chondrichthyes: sharks, skates, rays, and chimaeras ; Living representatives of primitive fishes ; Teleosts at last I: bonytongues through anglerfishes ; Teleosts at last II: spiny-rayed fishes -- Pt. 4: Zoogeography, genetics, and adaptations. Zoogeography ; Fish genetics ; Special habitats and special adaptations -- Pt. 5: Behavior and ecology. Fishes as predators ; Fishes as prey ; Fishes as social animals: reproduction ; Fishes as social animals: aggregation, aggression, and cooperation ; Cycles of activity and behavior ; Individuals, populations, and assemblages ; Communities, ecosystems, and the functional role of fishes -- Pt. 6: The future of fishes. Conservation.