Contents : - CH. 1. Introduction. - CH. 2. Porifera. - CH. 3. Coelenterates. - CH. 4. Reef Systems (new chapter to focus on corals/other marine invertebrates in captivity. - CH. 5. Platyhelminths. - CH. 6. Gastropods. - CH. 7. Cephalopods. - CH. 8. Bivalves. - CH. 9. Annelids. - CH.10. Limulus. - CH.11. Spiders. - CH.12. Scorpions. - CH.13. Crustaceans. - CH.14. Myriapods. - CH.15. Insects. - CH.16. Honey Bees (new chapter). - CH.17. Butterfly Houses(new chapter). - CH.18. Nematodes. - CH.19. Chaetognaths. - CH.20. Echinoderms. - CH.21. Urochordates. - CH.22. Diagnostic Techniques and Sample Handling. - CH.23. Laws and Regulations. - CH.24. Euthanasia (1E covered as an appendix; separate chapter now appropriate). - CH.25. Welfare (new chapter). - Appendix A. Sources of invertebrates and supplies (new appendix). - Appendix B. Neoplasia. - Appendix C. Reportable Diseases