The European Union (EU) promotes a sustainable blue economy in the coastal and marine regions. In Finland, the regional development objectives are defined at the national and regional levels. Maritime spatial planning (MSP) is a tool to reconcile the sea’s different uses. This study considers developing collaborative practices in regional planning to help meet regional development objectives. The MSP participants representing the coastal fishery (fishing and fish farming) in the Satakunta region, Finland, exemplify a local stakeholder group. Coastal fishery is a demanding and highly regulated livelihood, with the potential to grow as local food is trending. A mixed-method approach was used to examine MSP participants’ and fishery experts’ perceptions about regional cooperation and the MSP process. The semi-structured interviews focused on three main themes: regional cooperation and synergies, conflicts and threats, and interest in regional collaboration or establishing secondary businesses. Questionnaires 2019 and 2021 examined stakeholders’ engagement (intrinsic motivation) and social trust towards the planners in the MSP process. The need to tackle the challenges of coastal fishery dictates coastal fishery participants’ perceptions regarding the fishery business’s development in a regional context. Despite the collaborative approach, the first Finnish MSP round did not make a significant difference in the coastal fishery’s status as a stakeholder group. MSP processes and developing the sustainable blue economy are part of the regional development framework, requiring a level playing field and mutual trust among stakeholders. The regional development of marine and coastal areas would benefit from a joint forum for stakeholder interaction built upon MSP. Collaboration could strengthen the integrative and comprehensive management of sea uses and resources.

欧盟 (EU) 在沿海和海洋地区促进可持续的蓝色经济。在芬兰，区域发展目标是在国家和区域层面确定的。海洋空间规划 (MSP) 是一种协调海洋不同用途的工具。本研究考虑在区域规划中发展协作实践，以帮助实现区域发展目标。代表芬兰萨塔昆塔地区沿海渔业（捕鱼和养鱼）的 MSP 参与者是当地利益相关者群体的例证。沿海渔业是一项要求严格且受到严格监管的生计，随着当地食物的流行，其潜力不断增长。使用混合方法来检查 MSP 参与者和渔业专家对区域合作和 MSP 进程的看法。半结构化访谈集中在三个主题：区域合作和协同作用、冲突和威胁以及对区域合作或建立二级企业的兴趣。2019 年和 2021 年的问卷调查了利益相关者在 MSP 过程中的参与度（内在动机）和对规划者的社会信任。解决沿海渔业挑战的需要决定了沿海渔业参与者对区域背景下渔业业务发展的看法。尽管采取了合作方式，但芬兰的第一轮 MSP 并未对沿海渔业作为利益相关者群体的地位产生重大影响。MSP 流程和发展可持续蓝色经济是区域发展框架的一部分，需要利益相关者之间的公平竞争和相互信任。海洋和沿海地区的区域发展将受益于建立在 MSP 之上的利益相关者互动联合论坛。合作可以加强对海洋利用和资源的综合和综合管理。