As the scale of the marine economy continues to expand, the problems of environmental pollution and the over-exploitation of marine resources have become increasingly severe. The purpose of this study is to realize the sustainable growth of the marine economy, the rational utilization of resources, and the coordinated development of environmental protection. Method: This research first adopts the system dynamics (SD) model. It then uses the entropy method to weigh the evaluation indicators and create a coupling coordination degree (CCD) assessment simulation of the marine economic–resource–ecological environment. We use the created SD model to build and simulate four standard scenarios: current, economic, resource, and environmental. Finally, we propose suitable recommendations for the long-term development of the marine economy based on the coordination evaluation results of the CCD model. Results: Results show the following: (1) In the immediate term, the economic scenario is poorly coordinated, whereas the environmental scenario is more effectively coordinated. However, in the long-term development process, the resource scenario is reasonably well coordinated. (2) Priority attention must be given to improving the energy mix and protecting the natural environment to promote the sustainable development of the marine economy. (3) To achieve a virtuous cycle between marine economic development and environmental protection, governments, businesses, and all sectors of society need to work together to formulate and implement relevant policies and initiatives.

This study focuses on the green economic growth of marine fisheries and explores the relationship among environmental regulations (ERs), industrial structure (INS), and the green total factor productivity of marine fisheries (MGTFP). Against the backdrop of global climate change and increasing pressure on resources and the environment, a green fisheries economy has become key to achieving sustainable development. This study selects panel data from 11 coastal provinces and municipalities in China spanning from 2014 to 2023 and, through quantitative analysis, evaluates the implementation effects of ER policies on marine fisheries’ production methods, INS, and MGTFP. When measuring the MGTFP, this study innovatively incorporates fishery disaster economic losses as an undesirable output and employs the super-efficiency SBM-GML model for precise calculation. The results of the study showed that ERs was able to promote the increase in MGTFP, and the effect of REC was stronger. The mediating effect model suggests that industry structure mediates this process. The results of threshold effect analysis show that both ERC and ERM exhibit significant single-threshold effects. This study aims to provide empirical support and policy recommendations for the government to formulate more effective environmental protection policies and promote the transformation and upgrading of the marine fisheries sector, thereby fostering the green development of China’s marine fisheries.

In recent years, with the formal implementation of the Regional Comprehensive Economic Partnership (RCEP) and the rise of the blue economy, the trade cooperation between China and ASEAN in aquatic products has been further deepened and expanded. This paper utilizes United Nations Commodity Trade (UN Comtrade) data from 2001 to 2023 and combines the perspective of the blue economy to systematically analyze the characteristics of bilateral trade volume, growth rate, market distribution, and trade types of aquatic products between China and ASEAN. By applying the modified Constant Market Share (CMS) model, the paper conducts a factor decomposition and effect analysis of the growth factors in China’s aquatic exports to ASEAN. The analysis indicates that the competitiveness effect has the highest contribution rate, and competitiveness has been the primary driver of growth in China’s aquatic product export trade to ASEAN, followed by the growth effect increasing year by year, which shows the impact of the scale of demand, while the product effect is relatively low. In particular, product structure urgently needs improvement to meet the requirements of the blue economy. In ASEAN’s aquatic product exports to China, demand scale serves as the main driving force, with the product variety adapting to the Chinese market as a secondary contributor. However, under the blue economy framework, product sustainability and environmental friendliness have emerged as new considerations, while the contribution of competitiveness remains relatively low, suggesting a need for further enhancement to align with green trade standards.