What we do

We are cleaning our oceans by restoring oyster reefs

What happened to oyster reefs?

Oyster reefs used to cover 20-30% of the North Sea . However, 150 years ago oysters were a popular cheap source of protein, and were eaten to virtual extinction without realising the damage this would cause on the environment.

Oysters are amazing creatures. They play a key role in their ecosystems, protect our shores from erosion, generate biodiversity, remove excess nitrogen and filter the water.

We need to bring oysters back to restore ocean health.

Our vision

We exist to help our oceans before it's too late

The fastest way to restore lost oyster reefs

Our team of outstanding scientists has researched the best possible way to help oysters, and developed a tool-set to revolutionise marine restoration, making it meaningful, cost-effective and scalable.

We’ve run lab and field tests in The Netherlands and Denmark to prove the efficiency of our tool-set with successful results.

A helping hand: The Mother Reef

Biodegradable. Climate Friendly. Low Cost.

The currently deserted sea floor is not a suitable place for oysters to live. They would sink in the sand and die.

So we created the Mother Reef.

These bricks will be the base that will cover the deserted sea floor. We worked out the best conditions to help baby oysters attach to the Mother Reefs and release them into the ocean back to where they used to be, and become home to millions of other creatures too.

We partner with local fishermen to build the reefs

Our projects can be deployed anywhere in the world where oyster restoration is needed. We partner with local fishing communities and provide them with a new revenue stream and type of work.

Fishermen will use their boats, equipment and knowledge of the water to plant the Mother Reefs into the ocean. They will also benefit from the improvement of the ocean health and biodiversity.

Marine restoration at a scale never seen before

Thanks to the Mother Reef, the cost of restoring a reef will be significantly low at 0,25€ per oyster, compared to other projects with a cost varying between 20 to 1.000€ per oyster. Now marine restoration can finally reach large scale.

To fund more oyster restoration projects, we sell the ecosystem services that oyster reefs provide to businesses that want to become more sustainable and manage their environmental footprint. This way, for every reef we build, we can fund the next three, and so on.

Partners and supporters

Read our latest blogs and articles

Rewilding the Ocean: Restoring Oyster Reefs as a Holistic Solution

In the face of climate change, biodiversity loss, and the growing threats to our oceans, the concept of rewilding is emerging as an approach to restoring ecosystems to their natural states.
At Oyster Heaven, we believe that rewilding – or seawilding – the ocean through the restoration of oyster reefs is a key solution to help nature heal itself. By strategically restoring oyster reefs in specific locations, these reefs act as marine biodiversity hotspots encouraging species to return and thrive.

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Building Resilient Coasts with Living Breakwaters

As climate change intensifies, coastal regions around the world are facing increasing threats from rising sea levels, storm surges, and coastal erosion. Traditional artificial solutions like seawalls and breakwaters are often expensive, disruptive to marine habitats, and ultimately not sustainable in the long term.
At Oyster Heaven, we believe in turning to nature to support the best engineering solutions.

One of the most promising approaches we’ve identified is the regeneration of oyster reefs as living breakwaters to protect our coasts.

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Planetary Boundaries: Earth’s Ocean Acidification Nears Critical Threshold ​

The concept of planetary boundaries, introduced by scientists in 2009, outlines nine critical limits within which humanity can safely operate to maintain Earth’s stability.

At Oyster Heaven, we are tackling these challenges by restoring oyster reefs at scale – a vital solution for the health of marine ecosystems. Restoration of these habitats tackles many of these issues simultaneously

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Nature as a Core Business Investment

While well-run CSR programs do aim to make businesses more ethical and environmentally responsible, initiatives to support nature should not be relegated to CSR alone. Such investments should be treated as core operational costs necessary for a company’s survival, risk management, and profitability. It’s an essential cost of doing business.

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Shifting Baselines: A Hidden Challenge in Marine Restoration

Marine regeneration is an essential mission aimed at restoring our oceans back into the productive and healthy ecosystems they once were. Among the many challenges faced by conservationists, one concept that often quietly impacts efforts is the ‘shifting baseline syndrome’, first considered by fisheries scientist Daniel Pauly. This term refers to a phenomenon where each generation of scientists and ocean users accepts the condition of the environment they first encounter as the norm, or baseline, even though this baseline may have already been significantly degraded compared to previous generations.

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Unveiling bacterial secrets of oyster growth: Four questions for Dr. Natacha

tarting off her career on gut bacteria research in Cape Town, Dr. Natacha Juste-Poinapen took a fascinating path applying her chemical engineering expertise to the marine environment, a place close to her heart, having grown up near the ocean. As the first hire at Oyster Heaven, Natacha focuses on enhancing oyster regeneration and evaluating restoration site suitability by studying the microbiological components of oyster reefs. She collaborates with DTU Aqua in Denmark, and Deltares and NIOZ in the Netherlands, bringing unique insights to our ambitious goal of restoring historic oyster reefs.

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