Fisheries and aquaculture form the food-and-jobs core of the blue economy. The World Bank says aquaculture provides more than half of the world's seafood, and the sector is also where much of the technology and startup opportunity sits.
What the blue economy means and which sectors it includes
The blue economy is the sustainable use of ocean resources for economic growth, better livelihoods and job creation while keeping ocean ecosystems healthy, as the World Bank defines it. The definition matters when you read numbers.
NOAA uses a broader term. Its ocean economy is the sum of the economic activities of ocean-based industries, together with the assets, goods and services provided by marine ecosystems. NOAA notes that people use "blue economy" loosely. Some treat it as a synonym for the ocean economy. Others build sustainability into it. A figure labeled "blue economy" may therefore count more, or less, than one labeled "ocean economy."
Which sectors sit alongside fisheries and aquaculture?
A World Bank report on the blue economy lists fisheries, aquaculture, coastal and maritime tourism, marine biotechnology, extractive industries, desalination, renewable offshore energy and maritime transport among its sectors. Fisheries and aquaculture are the two that produce food directly. That is why they tend to anchor development programs in coastal countries.
How big are fisheries and aquaculture in global food supply?
They are very large. The World Bank reports that in 2021, fish and seaweed provided at least 20% of the protein intake for 3.2 billion people. Aquaculture alone supplies more than half of the world's seafood.
These are two different measures. One is a share of seafood by source, farmed versus caught. The other is how many people rely on aquatic food for protein. Use the first when sizing a farming market. Use the second when talking about food security.
How many jobs and how much value?
The FAO estimates that in 2024, 65.3 million people worked in the primary sector of fisheries and aquaculture, excluding subsistence activities. The World Bank gives a similar estimate of 62 million people in primary production. The gap comes from different estimates and years, so quote one source and its year rather than mixing them.
Growth projections are larger. A report cited by the World Bank says aquaculture could generate as many as 22 million new jobs by 2050 and foresees a $1.5 trillion investment opportunity in the sector over the same period. Treat that as a projection, not a current count.
In the United States, NOAA places fishing and farming in one group. Its glossary says the U.S. marine economy includes six ocean sectors, and the living resources sector covers commercial fishing, fish hatcheries and aquaculture. For a current dollar or job share, check NOAA's economic data directly, because that figure changes with each release.
What makes fisheries and aquaculture sustainable, and how is it measured?
Sustainability starts with healthy fish stocks. The World Bank says close to a third of fish stocks are overfished. It also says illegal, unregulated and unreported fishing significantly contributes to overfishing. Its remedies are better ocean governance, better fisheries management, repurposing harmful subsidies and promoting sustainable aquaculture.
Stock assessments are the clearest measure. One World Bank-supported project in Morocco, for example, assessed 14 fish stocks to manage and restore declining ones. The table maps each concern to its measure and what it means for a founder.
| Concern | How it is measured or regulated | What it means for a startup |
|---|---|---|
| Overfished stocks | Stock assessments | Data and monitoring tools have a clear buyer need |
| Illegal fishing | Governance and enforcement | Tracking and verification products fit here |
| Farm discharge | Permit coverage for stormwater and discharges | Compliance data can be a product |
| Space and permits | Site and permit approvals before trials | Budget time before you can show results |
| Biological timelines | Organisms grow on their own schedule | Plan longer than a sensor business would |
What are the risks and environmental impacts of aquaculture?
The main practical risks are time, space and permits, and discharge. Biology-based ventures run longer than sensor businesses because organisms grow on their own schedule. You often need space, water access and permits before you can show results.
In Florida, check stormwater rules early. The state's Department of Environmental Protection says operators must obtain permit coverage if stormwater from an industrial activity could reach surface water of the state or a municipal separate storm sewer system. The operator decides whether coverage is needed, though the department can decide otherwise after an inspection. An aquaculture or processing site should settle this question before construction.
Which technologies and startup opportunities are emerging?
Water quality data, ocean sensing and sustainable aquaculture or alternative materials are the practical entry points. A water quality dataset for a farm that needs to time harvests is already a business. We cover more ideas in our guide for ocean science students.
The World Bank says it invests in sustainable and climate-smart innovations in aquaculture. It reports a blue economy portfolio above $11.1 billion in active projects as of FY25. That is World Bank lending, not startup funding, but it shows where public attention is going. Sell to operators first. Their trust comes from results in real marine conditions.
How do founders fund a fisheries or aquaculture venture?
Sequence capital in order. Start with a proof of concept (a working demonstration of your core idea). Then pursue non-dilutive awards (money that takes no ownership stake), then an accelerator, then seed. Biology-based ventures should plan extra runway for slow timelines. Our read on what recent blue economy investment signals for founders shows how investors see the sector. Our guide to choosing blue economy events in South Florida helps you pick rooms where operators actually show up. If you want to ask about High Tide events or Ocean Exchange application support, reach out to Founding Blue through our site.