An innovative, sustainable solution to oyster reef decline has been named this year’s James Dyson Award Hong Kong Winner.
Designed by Dean Chan, Reef of Hope combines 3D-printed modular reef structures with biodegradable materials and bioactive coatings to restore oyster reefs and enhance marine biodiversity in the region.
Oyster reefs are critical to marine ecosystems, filtering water, stabilising shorelines and providing essential habitat. Yet globally more than 85% has disappeared, and in Hong Kong most remaining reefs are outside protected zones making them vulnerable to pollution, urban development and overharvesting.
“Reef of Hope is well-developed and grounded in local ecological relevance,” said Professor Joseph Wong, James Dyson Award Hong Kong Judge.
“Its focus on oysters – a species vital to Hong Kong’s marine biodiversity – makes it a meaningful innovation.”
Unlike conventional methods such as concrete blocks, Chan’s design prioritises ecological function not just durability. The curved, porous structure is said to improve nutrient flow, waste removal and larval settlement which are crucial for oyster growth.
The reef is made from biodegradable PHA, infused with oyster shell calcium carbonate and marine-safe minerals, eliminating the risk of microplastic pollution.
Field trials along Hong Kong’s shoreline showed a threefold increase in oyster settlement over traditional methods. The reef also attracted juvenile marine life within weeks, demonstrating its positive environmental impact.
“Winning the James Dyson Award is thrilling,” said Dean Chan. “It’s a platform to raise awareness about oyster reef restoration and marine conservation.”
As Hong Kong winner, the project will receive £5,000 to support further development and global impact.
