These proceedings report the result of a sub-regional consultation on the existence and effectiveness of environmental monitoring systems for fisheries and aquaculture in the Lower Mekong basin. The document also includes a baseline assessment of environmental monitoring systems in Cambodia, Thailand and Vietnam, and the report of a regional workshop to discuss the assessments findings and future steps to improve an environmental monitoring and early warning system that will improve climate change adaptation in fisheries and aquaculture in the area. The consultation identified main climate change related threats to fisheries and aquaculture and determined the minimum environmental variables and/or associated information that should be collected by a shared environmental monitoring and early warning system in order to support decision-making. Information gaps and pathways to the establishment of a shared monitoring system, information base and environmental data analysis platform were identified. The country assessments also reached out to relevant agencies in the target countries to gather feedback on what environmental issues they considered important and what parameters should be monitored to meet these ends.