Louisiana volunteers used 200 tons of discarded oyster shells to build a 400-foot barrier near an Indigenous village; two years later, live oyster density jumped from 52 to 130 per square metre

• Discarded oyster shells from restaurants are helping rebuild a vulnerable stretch of Louisiana’s disappearing coastline.
• At Grand Bayou Indian Village, volunteers used 200 tons of bagged oyster shells to create a 400-foot reef designed to protect the Indigenous community’s shoreline.
• Two years after the project was built, monitoring recorded a sharp increase in live oyster density, rising from 52 to 130 oysters per square metre between 2025 and 2026, according to the Coalition to Restore Coastal Louisiana (CRCL).