1. The Diversity of Fishes2. Fishes and their Habitats3. Swimming4. Buoyancy5. Gas Exchange, Blood, and the Circulatory System6. Osmoregulation and Ion Balance7. Food and Feeding8. Reproduction, and Life Histories9. Endocrine Systems10. Sensory Systems, and Communication11. The Nervous System12. The Immune System13. Behavior and Cognition14. Fisheries and Aquaculture