This document contains the report of, and some of the papers presented at, the FAO Regional Workshop on the Elaboration of National Plans of Action to Prevent, Deter and Eliminate Illegal, Unreported and Unregulated Fishing - Caribbean Subregion which was held at Port of Spain, Trinidad and Tobago, from 22 to 26 November 2004. The purpose of the Workshop was to assist countries in the Caribbean subregion to develop capacity so that they would be better placed to elaborate national plans of action to prevent, deter and eliminate illegal, unreported and unregulated fishing (NPOAs - IUU). The Workshop addressed issues relating to the 1995 FAO Code of Conduct for Responsible Fisheries, the 2001 International Plan of Action to Prevent, Deter and Eliminate Illegal, Unreported and Unregulated Fishing (IPOA-IUU) and Technical Guidelines No. 9 that have been developed to support the implementation of the IPOA-IUU; concepts of planning and the elaboration of action plans; a case study for the development of a NPOA-IUU in a small island developing State; decision-making about IUU fishing and skills enhancement through the identification of key issues relating to the elaboration of NPOAs-IUU, the primary vehicle by which the IPOA-IUU will be implemented by countries. Working groups were formed to encourage maximum participation in the Workshop. A review of the major IUU fishing problems in the region and their possible solutions were discussed.