The Ocean Bet: Inside Tanzania’s Quiet Push to a Blue Economy 

For decades, Tanzania’s coastline has been treated as scenery, with tourists making their way through it on their way to Zanzibar. Fishermen depend on it for subsistence, and ports move goods across it. However, as an economic engine, the ocean has largely sat at the margins of policy thinking. But that is beginning to change.  

East Africa’s economy is often linked to oil pipelines, major infrastructure, and digital growth. Meanwhile, Dar es Salaam is quietly preparing for something less obvious but possibly just as important: a planned blue economy guided by clear policies.  

At the centre of this shift is the government’s Blue Economy Investment Master Plan (2025–2035), a long-horizon framework designed to unlock value from Tanzania’s vast coastal and marine resources. It is not the first time the country has spoken about maritime potential, but it is the first time it is attempting to systematise it. The question now is whether this is a policy document or the beginning of a new economic frontier.  

From Coastline to Capital  

Tanzania has one of the longest coastlines in East Africa, stretching over 1,400 kilometres along the Indian Ocean. For decades, that coastline has been underutilised, contributing modestly through tourism and artisanal fishing, but rarely treated as a core economic engine. The new plan seeks to change that.  

The blue economy framework focuses on four key pillars:  

• Fisheries and aquaculture expansion  

• Maritime transport and port-led growth  

• Coastal tourism development  

• Emerging sectors such as offshore energy and marine biotechnology  

What differentiates this push is the emphasis on coordination and investment structuring. The government is prioritising marine spatial planning, a technical but critical tool that maps out how different ocean uses, such as fishing, shipping lanes, and conservation, can coexist without conflict. Alongside this, there is a clear pivot towards public-private partnerships (PPPs) to attract capital into what has historically been a fragmented sector. In effect, Tanzania is trying to turn a natural asset into an investable one.  

Jobs, Growth, and The Politics of Diversification  

With GDP growth holding steady at around 5–6 per cent and traditional sectors such as agriculture facing climate pressures, Tanzania needs new engines of growth. The blue economy offers three things policymakers are actively seeking: job creation, export diversification, and resilience.  

Aquaculture (the controlled cultivation of aquatic organisms such as fish and crustaceans) alone is expected to play a major role. Demand for fish is rising both domestically and globally, yet much of Tanzania’s fishing remains small-scale and inefficient. Scaling aquaculture could reduce pressure on wild fish stocks while opening up export markets.  

Tourism is another key area. Although Tanzania is famous for its safaris, its beaches and coastline, from Zanzibar to the mainland, have not reached their full potential. The blue economy plan sees coastal tourism as a way to bring in more foreign exchange.  

Beyond the economic benefits lies a bigger goal: making the economy less dependent on just a few industries. In East Africa, where economies can be hit hard by changes in commodity prices, having more variety is not just smart policy; it helps manage risk.  

The Regional Angle: Quiet Competition in East Africa  

Tanzania is not alone in looking to the ocean, as Kenya has, for years, spoken about its own blue economy ambitions, hosting global conferences and integrating the concept into national development plans. Seychelles and Mauritius have already built reputations as blue economy pioneers. What is notable, however, is Tanzania’s approach, which is less about global positioning and more about internal system-building. This raises an important question: could Tanzania leapfrog more visible blue economy champions by focusing on execution rather than branding?  

The Risks Beneath the Surface  

As with any emerging sector, the blue economy is not without its challenges, the first of which is governance. Many ministries and agencies are involved with marine resources, which can lead to overlap or gaps in rules. Without good coordination, the master plan might not move beyond the ideation stage.  

The second challenge is environmental sustainability. If fisheries, tourism, and offshore projects grow without enough safeguards, they could harm the ecosystems that support the economy. Adding marine spatial planning is a good move, but making it work in practice is what matters.  

Also, projects in aquaculture and offshore infrastructure need significant funding to get off the ground. When attracting private investors, the rules must be clear, risks must be shared, and there must be good projects to invest in.  

Finally, there is the issue of inclusion. People in coastal communities, many of whom depend on small-scale fishing, need to see real benefits. If only major investors profit while locals are left out, it could worsen inequalities.  

What This Means for Businesses  

For investors and corporates, Tanzania’s blue economy push signals a new frontier of opportunity, and areas to watch include:  

• Aquaculture ventures and value chain investments  

• Port and logistics infrastructure linked to maritime trade  

• Coastal tourism development and hospitality  

• Renewable marine energy and emerging ocean technologies  

The opportunity is more in timing than scale. Early movers are likely to shape market structures, partnerships, and regulatory frameworks.  

The Bottom Line  

Tanzania’s blue economy strategy is not dominating headlines or driving political debate. But it may prove to be one of the more consequential economic shifts in the region over the next decade.  

The ocean has always been there. What is changing is how Tanzania is choosing to use it.