May 22, 2026•2 min read•from Frontiers in Marine Science | New and Recent Articles

High seas marine protected areas under the BBNJ agreement: implementation gaps and governance pathways

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High seas marine protected areas (MPAs) play a crucial role in advancing the “30×30” target and enhancing biodiversity conservation in areas beyond national jurisdiction (ABNJ). However, significant implementation challenges remain, stemming from fragmented governance structures and insufficient coordination. This article examines the governance obstacles to effective high seas MPA implementation under the BBNJ Agreement, emphasizing the need for a clear operational framework.

High seas marine protected areas under the BBNJ agreement: implementation gaps and governance pathways

The establishment of high seas marine protected areas (MPAs) under the BBNJ Agreement represents a critical juncture in the evolving landscape of ocean governance. As the world increasingly recognizes the interconnectedness of marine ecosystems, these MPAs serve as vital tools to advance the “30×30” target, which aims to protect 30% of the global ocean by 2030. However, as highlighted in the recent article “High seas marine protected areas under the BBNJ agreement: implementation gaps and governance pathways,” the real challenge lies not only in the designation of these protected areas but also in the effective implementation and management of conservation measures. This concern is compounded by issues such as limited coverage, fragmented governance structures, and a lack of robust scientific data and monitoring.

The necessity for effective governance of high seas MPAs cannot be overstated. It is essential for ensuring biodiversity conservation in areas beyond national jurisdiction (ABNJ). The article underscores that the current governance framework is hindered by a lack of coordination among various institutional mandates and a persistent gap between designation and actual protection. This resonates with challenges faced in related areas, such as the variability of wave heights impacting infrastructure planning in the Lakshadweep islands, as discussed in “Wave height variability and extreme wave height estimation at remote islands of Lakshadweep for planning of infrastructure, Arabian Sea”. Just as understanding these dynamics is crucial for regional planning, so too is it vital for the effective management of MPAs.

Moreover, the article articulates the potential of the BBNJ Agreement to improve procedural coherence and promote coordination among stakeholders. Yet, it also emphasizes the pressing need for a clearer operational framework that facilitates substantive protection of high seas MPAs. This includes establishing dedicated mechanisms for implementation coordination, defining rules for enforcement, and embedding monitoring, control, and surveillance (MCS) into the management framework. The implications of these measures extend beyond mere governance; they speak to a collective responsibility for ocean stewardship, a theme echoed in discussions surrounding plastic waste management, as explored in “Plastic waste emitted to the ocean per capita - Our World in Data”.

As we look to the future, the question remains: how will the international community bridge the gap between high seas MPA designation and effective protection? The urgency of this inquiry is amplified by the ongoing pressures of climate change and the escalating threats to marine biodiversity. The BBNJ Agreement offers a promising framework for collaboration, yet its success hinges on the commitment of nations to prioritize implementation and accountability. Moving forward, it is critical to foster a culture of data sharing, bolster scientific cooperation, and engage all stakeholders in the management process. This is not merely a governance challenge; it is a pivotal opportunity to redefine our relationship with the ocean, ensuring that future generations inherit a thriving marine environment. As we navigate this complex landscape, the call to action is clear: collective efforts must be mobilized now to secure the health of our oceans for the long term.

Against the backdrop of ocean governance that increasingly emphasizes cross-border coordination, institutional coherence, and implementation linkage, high seas marine protected areas (MPAs) have emerged as an important governance tool for advancing the “30×30” target and strengthening biodiversity conservation in areas beyond national jurisdiction (ABNJ). However, the main challenge of high seas MPAs lies not only in their limited coverage, but also in the difficulty of translating conservation designations into sustained and coordinated implementation within a fragmented cross-sectoral governance structure. Existing practice and research show that high seas MPA implementation has long been constrained by dispersed institutional mandates, weak scientific data and monitoring, unclear management and enforcement arrangements, poor data sharing, and persistent participation and capacity gaps. A significant divide therefore remains between MPA designation and effective protection. Drawing on existing high seas MPA practice and the Agreement under the United Nations Convention on the Law of the Sea on the Conservation and Sustainable Use of Marine Biological Diversity of Areas beyond National Jurisdiction (BBNJ Agreement), this article combines doctrinal legal analysis with comparative institutional analysis to identify the principal governance obstacles to high seas MPA implementation and to evaluate both the potential and limits of the new Agreement in addressing them. The article argues that the BBNJ Agreement provides an important global institutional foundation for improving high seas MPA governance by promoting greater procedural coherence, coordination, and transparency, but it has not yet produced a sufficiently clear operational implementation system. Effective governance of high seas MPAs under the BBNJ framework requires moving beyond formal designation toward more substantive protection. This includes establishing a dedicated implementation coordination mechanism, further specifying implementation and enforcement rules, embedding monitoring, control, and surveillance (MCS) into the management framework, strengthening targeted proposal support, long-term scientific and technical cooperation networks, and data-sharing arrangements.

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Grounding the BBNJ agreement’s resource mobilization goal: cost benchmarks and the case for needs-based fundingThe Agreement Under the United Nations Convention on the Law of the Sea on the Conservation and Sustainable Use of Marine Biological Diversity of Areas Beyond National Jurisdiction (BBNJ agreement) established a historic legal framework for conserving and sustainably using marine biological diversity in areas beyond national jurisdiction. However, translating this framework into implementation hinges critically on adequate financing, particularly for developing States Parties. Article 52(11) of the BBNJ agreement mandates the Conference of the Parties to establish an “initial resource mobilization goal through 2030” for the special fund. To support this mandate, this review synthesizes available cost data and institutional benchmarks from analogous international conservation and marine governance mechanisms relevant to activities eligible for funding under the special fund, including: capacity-building and technology transfer; implementation of the agreement including area-based management tools and environmental impact assessments; conservation and sustainable use programs by Indigenous Peoples and local communities; and public consultations. We identify cost ranges supported by empirical precedent, acknowledge significant research gaps, and discuss implications for COP-level resource mobilization discussions. This synthesis aims to support the evidence base necessary to support the Conference of the Parties’ deliberation on Article 52(11), emphasizing that the resource mobilization goal must be grounded in developing States Parties’ evidence-based needs assessments rather than comparable mechanisms’ allocations, which reflect budgetary realities rather than comprehensive implementation requirements.

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#ocean data#marine biodiversity#data visualization#marine science#marine life databases#climate monitoring#in-situ monitoring#interactive ocean maps#research collaboration#ocean circulation#research datasets#marine protected areas#high seas#BBNJ agreement#biodiversity conservation#implementation gaps#areas beyond national jurisdiction#governance pathways#conservation designations#monitoring control and surveillance

High seas marine protected areas under the BBNJ agreement: implementation gaps and governance pathways

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