The book "Antifouling Paint Biocides" offers a comprehensive analysis of the latest developments in the field of biocides for antifouling coatings. It addresses key topics such as the occurrence and concentrations of antifouling compounds, their environmental behavior, and analytical techniques for monitoring and control. Additionally, ecological modeling, ecotoxicological effects, and risk assessments are discussed, with a focus on findings from the last ten years. The contamination of the aquatic environment by antifouling compounds has gained significance in recent years, underscoring the relevance of this work. The various classes of antifouling biocides, including traditional organotin compounds and modern organic booster biocides, are examined in detail. The chapters are authored by leading experts in their field, who critically highlight the essential advancements. This book is a valuable resource and provides a solid foundation for understanding antifouling biocides.