* Phylum Amoebozoa, D Zilberg, Ben Gurion University of the Negev, Israel and B L Munday, University of Tasmania, Australia; * Phylum Dinoflagellata, E J Noga and M G Levy, North Carolina State University, USA; * Diplomonadida (Phylum Parabasalia) and Kinetoplastida (Phylum Euglenozoa), P T K Woo; * Ichthyophthirius multifiliis and Cryptocaryon irritans (Phylum Ciliophora), H W Dickerson, University of Georgia, USA; * Trichodinidae and Other Ciliates (Phylum Ciliophora), L Basson and J Van As, University of the Free State, South Africa; * Phylum Apicomplexa, K Molnar, Veterinary Medical Research Institute, Hungary; * Phylum Microspora, I Dykova, Institute of Parasitology, Czech Republic; * Phylum Myxozoa, S W Feist and M Longshaw, CEFAS Weymouth Laboratory, UK; * Monogenea (Phylum Platyhelminthes), K Buchmann and J Bresciani, The Royal Veterinary and Agricultural University, Denmark; * Digenea (Phylum Platyhelminthes), I Paperna and R Dzikowski, Hebrew University of Jerusalem, Israel; * Cestoidea (Phylum Platyhelminthes), T A Dick, C Chambers and I Isinguzo, University of Manitoba, Canada; * Phylum Nematoda, K Molnar, K Buchmann and C Szekely, Veterinary Medical Institute, Hungary; * Phylum Acanthocephala, B B Nickol, University of Nebraska-Lincoln, USA; * Phylum Arthropoda, R J G Lester and C Hayward, The University of Queensland, Australia; * Phylum Annelida: Hirudinea as Vectors and Disease Agents, E M Burreson, The College of William and Mary, USA; * Fish-borne Parasitic Zoonoses, R C Ko, The University of Hong Kong, People's Republic of China; * Parasitic Diseases of Shellfish, S M Bower, Pacific Biological Station, Canada; * The Immune System of Fish, W B van Muiswinkel and B Vervoorn-Van Der Wal, Wageningen University, The Netherlands; * Immunocompetent Cells and Their Mediators in Finfish, B F Ardelli, McGill University, and P T K Woo; * Molecular Approaches and Techniques, T G Clark, Cornell University, USA.