Bangladesh is no longer relying solely on concrete embankments to protect its coast from cyclones and tidal surges.
In February 2026, one of the world’s largest ‘bio-engineered coastal walls’ was successfully completed on the Sitakunda and Mirsarai coasts. It is essentially a living wall made of artificial oysters and algae.
How does this oyster wall work? A special type of concrete frame is installed on the seashore where oysters and columns naturally settle. These oysters create a huge rocky wall over time.
The 2025 cyclone showed that this natural wall can cut the strength of sea waves by around 60%. It not only prevents erosion, but also protects marine biodiversity.
Eco-system restoration: In 2026, there was a noticeable rise in the breeding of Hilsa and other sea fish around these reefs. Fishermen are now getting a lot of fish close to the shore.
Experts from the Netherlands have recognized this model of Bangladesh as ‘cheap and sustainable’. It proves that it is possible to protect nature with the help of nature, not against it.
