The restoration of coral reefs reached a historic milestone in Seychelles, where a land-based laboratory managed for the first time to reproduce corals through controlled spawning. The project, driven by Coral Spawning International, Nature Seychelles, and Canon, has already produced nearly 800,000 embryos and about 65,000 juvenile corals.
The initiative began operating in November 2025 and represents the first center of its kind in Africa and the western Indian Ocean. Additionally, it emerges at a critical moment for marine reefs, affected by rising ocean temperatures and extreme weather events.
For decades, coral ecosystems have suffered mass bleaching events linked to global warming and the El Niño phenomenon. As a result, numerous species have lost their survival capacity in various tropical regions.
A laboratory that mimics the ocean’s natural cycles
The new system differs from traditional coral restoration techniques. Until now, many projects used fragments of existing colonies to multiply corals in underwater nurseries.
However, this method generates genetically identical organisms, which reduces biological diversity and limits the ability to adapt to climate change. Therefore, the Seychelles laboratory opted for controlled sexual reproduction.
Scientists recreate environmental factors on land such as water temperature, daylight duration, and lunar cycles. In this way, they manage to stimulate the natural spawning of corals and collect eggs and sperm under controlled conditions.
Moreover, the permanent monitoring of variables like water quality, lighting, and temperature allows for the protection of the most vulnerable stages of embryonic development, where thousands of larvae typically die in the open ocean.
Technology and research to restore reefs
The laboratory primarily works with the species Acropora tenuis cf. macrostoma. From 14 colonies, they have managed to produce tens of thousands of new organisms capable of settling and beginning their growth.
Although it remains to be seen how many will reach adulthood, researchers believe the project has already overcome one of the most complex barriers of marine restoration.
Additionally, the imaging technology developed by Canon has allowed for the observation of virtually invisible reproductive processes until now. High-resolution cameras and specialized lenses have recorded the release of gametes, fertilization, and early development of embryos.
In the coming months, scientists will begin the transplantation of juvenile corals to the ocean. There, they will face predators, diseases, pollution, ocean currents, and new thermal stress events.
Why corals are essential for marine ecosystems
The coral reefs play an essential role in oceanic biodiversity. Although they occupy less than 1% of the seabed, they host about 25% of all known marine species.
Additionally, they serve as refuge and breeding grounds for fish, mollusks, and crustaceans that sustain entire food chains. Many coastal communities depend directly on these ecosystems for their food and local economy.
On the other hand, corals act as natural barriers against storms and coastal erosion, reducing the impact of waves and hurricanes on human populations.
However, the increase in sea temperature, pollution, and ocean acidification threaten their survival worldwide. Therefore, initiatives like the one developed in Seychelles aim to increase the genetic diversity of reefs and improve their adaptation possibilities in an increasingly warm ocean.
