1. History of Fish immunology 2. Immune organs of fish 3. Inflammation 4. Innate immunity of fish 5. Key cells involved in fish innate immunity – leucocytes 6. Innate immune sensing in fish: Cell based 7. Humoral-based immune sensing in fish 8. Fish Cytokines and chemokines 9. Major Histocompatibility Complex (MHC) in fish 10. Antigen presentation 11. T-cell response in fish 12. Immunoglobulins of fish 13. B-cell response in fish 14. Hemocytes in shellfish and tissues of their immune system 15. Pathogen recognition receptors (PRR) of shellfish 16. ProPO in shellfish 17. Coagulation in shellfish 18. Anti-viral mechanisms in shellfish