Blue Finance Requires Revenue, Risk Sharing, and Verifiable Ecological Results

The ocean’s deterioration is not an argument for resignation, Steven Kessel said, but it does create a difficult investment case. Coastal ecosystems face climate change, habitat loss, and persistent fishing pressure built up over decades of commercial and unsustainable fishing. Coral reefs, mangroves, seagrass beds, fisheries, and coastal communities are connected systems; damage in one part reverberates through the others.

The central financing problem, Joan Larrea argued, is not simply that ocean conservation receives too little money. Conserving a mangrove forest or protecting a coral reef usually does not create a direct, reliable revenue stream for an investor. That work has therefore largely belonged to governments and philanthropy—sources Larrea described as essential but tiny relative to global investment capital. He contrasted “hundreds of trillions” in investment capital with roughly a hundred billion in donor and aid money, while noting that government aid is declining.

Larrea defines blended financeA structure that uses concessional or donor capital to bring private investment into a deal. in deliberately simple terms: using relatively small amounts of donor or concessional capital to change the risk or return profile of a deal so that much larger pools of investment capital will participate. Guarantees and first-loss protections are among the basic tools. The task is to structure a transaction around benefits that are otherwise financially invisible: reduced losses, fiscal savings, protected livelihoods, and healthier ecosystems.

“Blue finance,” by contrast, is a label broad enough to obscure those mechanics. It may include conservation debt swaps, insurance-linked resilience programs, marine-protected-area enterprises, nature-related credits, and corporate supply-chain arrangements. Larrea’s preference was to look past the category and ask practical questions: Who receives capital? What makes repayment possible? Who bears the risk? Who verifies results? And what local institution can convert a financial commitment into ecological protection?

The absence of direct revenue does not mean the asset lacks economic value. Liz Henderson said healthy mangroves and coral reefs can reduce flooding intensity and damage to high-value coastal properties, sometimes by as much as 50%. The harder task is bringing those downstream avoided losses into an upfront financing decision. Much of the evidence, she said, remains in narrow academic studies rather than in the models, disclosures, and transaction structures used by lenders, insurers, businesses, and governments.

For a coastal hotel, the connection can be concrete. A healthy marine environment supports beaches and water quality while potentially reducing downtime after flooding. In Jamaica, Guidi described hotels in Ocho Rios joining local fishers after visitors found too few fish while snorkeling and diving. Their response was to preserve remaining mangroves and establish a marine protected area. The rationale may be intuitive; the financial machinery to make such efforts routine is not.

Joan Larrea offered Belize’s 2021 debt-for-nature transaction as a model for financing conservation through an existing fiscal constraint rather than through reef or mangrove revenue. Belize issued new debt and used the proceeds to retire more burdensome sovereign obligations. Larrea said the refinancing involved $264 million in new debt and created roughly $180 million in fiscal breathing room. That space supported a conservation office and program, with covenants requiring action to protect marine assets such as reefs, mangroves, and protected areas.

The design aligned several interests at once. Donors helped make the new debt investable through credit enhancement or a commitment to absorb early losses if the transaction went wrong. Belize gained an easier debt profile and longer-term conservation funding; investors received debt whose risk characteristics they could accept; donors attached conditions tied to ecological action. The conservation component did not create the debt’s repayment stream. It was attached to a refinancing that made the country’s debt burden more manageable.

Larrea said independent scientists are needed not only to help design such arrangements but to establish whether promised conservation spending and activity actually occur. In his account, that assurance matters to donors who are being asked to support a transaction that also serves capital-market participants.

Insurance addresses a different stage of the problem. Liz Henderson stressed that insurers do not generally provide the upfront money for restoration. Their role is to model risk, identify where resilience measures may reduce loss or business interruption, and protect an investment if the adverse event still occurs. The insurance industry, she said, has paid about $2.5 trillion in natural-disaster claims since 2000—payments that help communities and businesses rebuild after events rather than preventing damage beforehand.

Jamaica’s catastrophe bond illustrates the distinction. Henderson said Hurricane Melissa triggered a payout of approximately $150 million from a catastrophe bond purchased by the Jamaican government. The protection was not intended to replace individual homeowners’ or businesses’ private insurance. It gave the government funds it could deploy quickly for cleanup, conservation, repair, restoration, and other uninsured parts of the economy.

Jamaica had paid for that coverage for about a decade before the trigger occurred. That can be politically difficult, Henderson said, because the cost is immediate while the benefit may not materialize for years—or at all. The instrument preserves financial capacity against a contingent event rather than waiting until losses have already arrived.

Insurers’ models can also be used before a disaster, Henderson argued, to identify where restoration, flood-reduction measures, or operational protections may produce the greatest reduction in loss. Insurance can then protect the investment if the bad outcome still happens. It is part of the analytical and financial architecture for resilience.

The financial case for marine restoration can miss biological relationships that are not obvious on a balance sheet. Steven Kessel pointed to a practical tension at coastal resorts: mangroves can be unattractive to guests because of sulfurous mud and mosquitoes, so owners may prefer visibly appealing reef investments. But mangroves, seagrass beds, and coral reefs are not independent assets.

Juvenile reef fish use mangrove roots and seagrass beds as nursery habitat. Without those habitats, Kessel said, healthy reefs cannot be sustained. A model centered only on the reef tourists can see may omit the ecological systems that make the reef viable.

That is one reason researchers need to be in the room with financiers, insurers, public agencies, and local operators. Kessel said it is unusual for insurance professionals and field researchers to share a conversation, even though the former need credible models and the latter understand ecological connectivity that those models can overlook.

Science also shapes the rules under which finance operates. Joan Larrea argued that research and public exposure can lead to regulation; regulation sets enforceable minimum standards; and those standards change the behavior of lenders and investors. He cited dolphin-safe tuna standards as an example: public concern about dolphin deaths in tuna fishing was followed by rules that companies had to meet to sell tuna under that label. He also cited the Cuyahoga River fire and the subsequent creation of U.S. environmental regulation as an illustration of how visible environmental failure can produce rules that financial actors must take into account.

Government is therefore not an optional participant. When Guidi pressed Larrea on its role, he pointed out that regulation originates with governments. He cited European Scope 3 emissions requirements for banks as an example of how requirements in one jurisdiction can influence lending behavior elsewhere, including in emerging markets where European banks operate.

Kessel added that countries with substantial natural assets may lack the scientific personnel, monitoring infrastructure, or enforcement capacity needed to direct funds and demonstrate results. Money can appear to “go into a void,” he said, when implementation cannot be tracked or effectively administered. For ocean finance, local research and enforcement capacity determine whether an ecological commitment can be designed intelligently and put into practice.

Even a well-designed conservation project may be too small for the institutions that control large pools of capital. Joan Larrea said institutional money generally does not move in $5 million or $20 million checks. It seeks opportunities of $100 million or more and may not want to provide more than 20% of a deal. A $500 million coral-reef investment opportunity is difficult to assemble.

Convergence sees only two to six blended-finance transactions a year in the blue economy, Larrea said. Belize and a small number of comparable transactions stand out because they have reached meaningful scale. The practical response is financial intermediation: large investors can finance an institution that makes smaller loans, which may in turn reach still smaller borrowers. But that architecture often does not exist in marine conservation. A fisher at the end of the “money chain,” as Larrea put it, may only be able to borrow in very small increments. Someone has to make those loans, assess risk, administer them, and aggregate many local activities into an opportunity large enough for outside capital.

Blue Alliance was presented as a work in progress attempting to build that structure around marine protected areas. Larrea said the nonprofit has raised $65 million and is working, including in Indonesia, to organize disconnected income from tourism, fishing, philanthropy, and government support into locally engaged enterprises. Those enterprises can sign co-management agreements with local governments and seek more reliable financing than isolated revenue streams provide.

The model’s ambition is to turn scattered economic activity around marine protected areas into a cohesive platform that can attract larger pools of capital. It does not eliminate the small scale of local livelihoods; it creates an organizational layer that can connect them to finance.

Ecological risk makes that task harder. Steven Kessel said coral restoration can be effective, but a single severe heat wave can erase years of costly work. His team at Shedd Aquarium is working with partners in Florida and along the Florida Reef Tract to identify heat-resistant genetic strains of coral. Research, restoration, and financing must proceed simultaneously, he argued, even though the outcome cannot be guaranteed.

Funders may have to accept a high level of risk because the need is great, Kessel said. Waiting for certainty offers no protection against continued ecosystem loss.

Larrea identified a separate distributional problem: the people who benefit from environmental degradation are often not the people who bear its costs. Energy use elsewhere can contribute to ocean warming and more severe storms while vulnerable coastal communities face the damage. A local project may produce benefits, but that does not itself align the parties creating environmental harm with the parties absorbing it.

Blue carbon and biodiversity credits are possible, but incomplete, attempts to reconnect private payments to ecological benefits. Larrea said credible credits would require agreement about what is being measured, stable pricing, and a viable market. He was cautious about both the credibility problems such markets can face and the conceptual difficulty of comparing different forms of nature.

Liz Henderson similarly said nature-based carbon credits have begun to support an insurance market, but she did not present that as a mature template for the ocean. She estimated current insurance premiums related to nature-based carbon credits at roughly $30 million, with potential growth to $1.5 billion to $3 billion over the next 20 to 30 years as net-zero commitments mature. Blue credits might follow a similar path, she said, but likely through an even more difficult process. She had not seen a fully realistic and financially sound way to place nature’s value directly on a corporate balance sheet.

Liz Henderson described a climate-risk insurance pilot involving a large retail coffee company and growers in Colombia. It was not an ocean project, but it supplied a design pattern relevant to blue finance: connect a company’s measurable exposure to a local resilience need, use public support where it changes affordability, and direct protection to the people whose recovery preserves the system.

The coffee company had already diversified its grower base and used financial hedging against commodity-price volatility. It was still experiencing disruptions in coffee yield and quality, particularly in Colombia. Drought affected harvests, while farmers struggling to recover after climate shocks could leave agriculture altogether, with younger generations not necessarily taking up family farming.

The resulting insurance product was funded by the corporate buyer as supply-chain protection and partly offset through Colombian government subsidies for farmers who typically lack access to insurance. Individual farmers received the benefit when a trigger produced a payout. Building it required coordination among farmers, a cooperative, the government, and the retailer.

That separation is the relevant lesson for coastal systems. A hotel, seafood buyer, water-intensive manufacturer, or other business may be willing to pay for protection that benefits a community or ecosystem because its own operations depend on that community’s resilience. Henderson did not suggest that every conservation project should become an insurance product. She described a structure in which the financial beneficiary of resilience, the buyer of protection, and the recipient of a payout can be different entities.

Corporations can also act as aggregators, Joan Larrea said. Businesses with fixed facilities cannot always relocate when local environmental conditions deteriorate. They may need a social license to operate, a stable supply chain, or a reliable resource base. In such cases, Larrea said, a corporation can provide catalytic capital rather than seek financial returns from the transaction.

Offtake agreements are another tool. A corporate buyer that commits to purchasing a defined quantity of coffee, tuna, or another product can provide the dependable demand lenders need in order to finance smaller producers. If the corporation’s credit quality becomes part of the arrangement, it can function as the “trunk line” connecting dispersed local activity to larger pools of capital.

Henderson described comparable coalition-building around water. Agriculture, hydropower, industrial manufacturing, beverage companies, and new data centers can depend on the same watershed. Companies are beginning to ask whether a new water-intensive facility might undermine established users. The potential response is co-investment among parties that depend on the same soil, water, and ecosystem rather than an isolated conservation project by one company.

The same logic underlies efforts to prevent “blue washing”: attaching a marine label to a financial product without evidence of ecological results. Larrea highlighted a prospective Coral Reef Bond that, at the time of the discussion, had not yet launched. He described a structure in which part of bondholders’ returns would depend on ecological outcomes, such as fisheries or fish-species measures around a reef in Indonesia. If the program outperformed, the Global Environment Facility and other backers could top up returns; if it underperformed, investors could receive less interest.

The proposed structure would make institutional investors pay attention to reef conditions while allowing donor funding to depend on results rather than promises. Kessel and Henderson’s comments on monitoring frame its unresolved challenge: ecological measurements need credible local capacity, independent scrutiny, and due diligence robust enough for investors and insurers to rely on them. The bond’s stated design ties financial outcomes to ecological performance; whether that linkage can be demonstrated depends on those monitoring systems.