The global ocean economy is worth approximately $1.5 trillion annually, according to United Nations data, with projections from multiple institutional sources pointing toward $3 trillion by 2030. Africa's share of that figure currently stands at approximately $300 billion per year, supporting 49 million jobs across the continent, according to the African Union's Blue Economy Strategy. Those are not speculative numbers. They are the baseline from which an institutional investment case is built. The question for allocators is not whether the ocean generates value. It demonstrably does. The question is whether the legal and structural framework exists to capture that value with appropriate liability protection and exit clarity. In a small number of jurisdictions, it does.

Africa's Blue Economy is projected to reach $405 billion annually by 2030 and to exceed $1.5 trillion by 2050, according to the African Union Development Agency. The continent's 38 coastal and island states command 47,000 kilometres of coastline across three oceans, served by 85 commercial ports. Eastern African economies alone currently generate over $10 billion annually from Blue Economy activity, according to the United Nations Economic Commission for Africa. Against that backdrop, Africa loses an estimated $1.3 billion each year to illegal, unreported, and unregulated fishing, according to the Overseas Development Institute. The gap between what the ocean produces and what is properly captured by licensing, compliance, and institutional management is where the investment thesis begins.

Mauritius presents a specific and instructive case. The government of Mauritius claims an Exclusive Economic Zone of approximately 2.3 million square kilometres, ranking it as the 20th largest maritime area in the world and making it almost 500 times larger than the country's land territory. The undisputed portion of that EEZ amounts to approximately 1.3 million square kilometres, with a further 388,000 square kilometres of continental shelf jointly managed with Seychelles, according to the United States Department of State Investment Climate Statement for Mauritius, published in September 2025. Both figures are relevant. The claimed area defines the ambition of the maritime estate; the undisputed area defines the investable perimeter for institutional capital that requires uncontested legal title.

Within that EEZ, several asset classes are already at varying stages of development or confirmed discovery. The Mauritius Economic Development Board confirms the presence of polymetallic nodule fields and inactive hydrothermal mineral deposits identified through a joint Mauritian and Japanese scientific expedition. The Offshore Petroleum Act provides the legal framework for hydrocarbon exploration and exploitation within the EEZ. The South-South maritime trade corridor, which passes through Mauritius's maritime zone, carries an estimated $3.75 trillion in annual trade, with approximately 30,000 vessels transiting annually. Bunkering at Port Louis exceeded $500 million in recorded sales in 2022, with government targets set at 1,000,000 metric tonnes by 2025 and 1,500,000 metric tonnes by 2027.

An Exclusive Economic Zone is a legal instrument as much as a geographic boundary. Under the United Nations Convention on the Law of the Sea, an EEZ confers sovereign rights over all economic resources within it: fisheries, hydrocarbons, seabed minerals, and the energy generated from water, currents, and wind. What it does not confer automatically is the institutional infrastructure to monetise those rights. That infrastructure, comprising licensing regimes, environmental compliance frameworks, enforcement capacity, and dispute resolution mechanisms, is what separates a theoretical maritime estate from an investable one.

The High Seas Treaty, formally the Biodiversity Beyond National Jurisdiction Agreement, entered into force in January 2026 following its 60th ratification by Morocco in September 2025. Over 30 African countries have signed the treaty, and eleven AU member states have ratified it. This matters for deepwater investment because the treaty establishes, for the first time, a governance framework for marine resources beyond national jurisdiction. For allocators considering assets in areas that sit at or near the boundary of established EEZs, the treaty reduces legal ambiguity and creates a multilateral dispute resolution pathway that did not previously exist.

Within the broader maritime estate, the asset classes most accessible to institutional capital in the near term are not deepwater hydrocarbon exploration, which carries substantial geological and political risk, but the structured monetisation of existing maritime infrastructure and licensing positions. These include bunkering and maritime services concessions, sustainable aquaculture licensing, marine biotechnology research agreements, seabed survey and data rights, and the development of offshore renewable energy infrastructure within established EEZs.

The Mauritius 2025 to 2026 national budget allocated dedicated funding to Blue Economy development, with the Economic Development Board identifying aquaculture, marine biotechnology, and offshore renewable energy as priority investment sectors. Each of these asset classes shares a common structural characteristic: the returns are generated not primarily from resource extraction but from the licensing and operational frameworks that govern access to the maritime estate. This is a fundamentally different risk profile from upstream oil and gas, and one that is more appropriate to institutional allocation horizons of 10 to 20 years.

The Variable Capital Company, which Mauritius introduced specifically to attract institutional fund structures, is directly applicable to maritime asset portfolios. A maritime VCC can be structured with separate cells for each asset class: one cell holding the bunkering concession and associated infrastructure, a second holding the aquaculture licensing position, a third holding seabed survey data rights, and a fourth holding any offshore energy development interests. Each cell is legally ring-fenced. A regulatory challenge affecting the aquaculture concession does not cross-contaminate the bunkering revenue stream. The structure also permits each cell to be financed, insured, and, if necessary, divested independently, which is a critical feature for institutional limited partners who require clear portfolio liquidity management.

The primary risks in maritime asset investment are sovereign, environmental, and operational. On the sovereign dimension, Mauritius offers ICSID arbitration access, a common law judicial system, and treaty-based investment protections across more than 40 bilateral agreements. On the environmental dimension, any commercial operation within the EEZ is governed by the Mauritius Marine Parks and Reserves Act, the Fisheries and Marine Resources Act, and the requirements of any applicable international agreement. Environmental compliance is therefore not optional; it is the legal precondition for operating within the licensing framework. Syndicates that treat compliance as a cost centre rather than a structural protection will not survive regulatory review. On the operational dimension, the primary risk in the near term is not geological but institutional: the capacity of the host government's maritime enforcement apparatus to police the EEZ against illegal fishing and unauthorised extraction. Africa currently loses $1.3 billion annually to illegal fishing, and Mauritius is not immune to that dynamic.