Marine ecological aquaculture is considered a robust scientific farming model, but it has not been widely promoted in China. Although some studies have examined stakeholders’ interests in ecological transformation, few studies to date have analyzed the interaction mechanism of the stakeholders in ecological transformation. Therefore, drawing on evolutionary game theory, this study analyzed the different behavioral strategies and evolutionary mechanisms of the government, marine aquaculture farmers, and aquatic enterprises engaged in marine farming processes. Furthermore, a numerical simulation was conducted to evaluate the rationality of the theoretical model. The results show that several factors affected the ecological transformation of mariculture. Government subsidies reduced farmers’ and aquatic enterprises’ costs of adopting ecological farming. The government’s increasing fines for aquaculture pollution slowed down the speed of the system to a stable point. The cost of adopting ecological farming by farmers and aquatic enterprises will affect their decision to adopt or invest in it. The increase in the market price of eco-aquatic products helped accelerate the ecological transformation of mariculture. The brand effect obtained by aquatic enterprises by investing in ecological farming helped increase participation to further improve this practice. In terms of policy implications, we recommend the promotion and guidance of marine aquaculture technology, government support and investment, environmental control of the aquaculture industry, and brand building of eco-aquatic products to transform and upgrade marine aquaculture farming.

As an important market-based emission reduction tool, the carbon market plays an important role in China's ability to meet its "30•60" goal 1 . Deeply analyzing the evaluation system of the carbon market in Fujian province is of great reference value for other regions when formulating carbon exchange policies. This paper aims to analyze the evaluation index system of the carbon market based on the analytic hierarchy process (AHP)-fuzzy comprehensive evaluation model and the development level of each factor in the environmental energy exchange platform in Fujian province. The results are as follows: (1) the evaluation results of the exchange platform are at an average level. There are significant differences in the level of internal indicators in the carbon market. Therefore, multi-dimensional efforts should be made to promote the operational effect of the carbon market.(2) The evaluation results of some indicators are at a poor level of excellence, such as the exchange rules, measurement work, and professional management personnel, which are important factors affecting the operation effect of the carbon market. Based on the above findings, this paper proposes several suggestions in terms of enhancing the influence of platform, setting convenient exchange 1 The "30.60" target refers to China's response to climate change by promoting the reduction of greenhouse gases, especially carbon dioxide. China has proposed that its carbon dioxide emissions should peak by 2030 and that it should become carbon neutral by 2060.