A wall of oysters is protecting a South Carolina community from erosion

A nearly 2,000-foot-long wall covered in oysters is now protecting the South Carolina coastline in Laurel Bay, a community home to many military families near a Marine Corps base, from worsening erosion. The structures sit along Port Royal Sound, where homes and a public park face growing environmental threats as coastal salt marshes and uplands erode.

"With increasing levels of water and sea level rise, increasing storm events, we're seeing that erosion is exacerbated," said Susanna Massalon Hopkins of the Nature Conservancy, which partnered with federal agencies to build the structures. The "oyster castles" are interlocking concrete blocks arranged to form a shoreline wall that breaks incoming waves and slows erosion; when finished next month, the wall will stretch the full 2,000 feet.

The structure serves a dual purpose: as oysters attach and grow on the blocks, the wall gradually becomes a living reef that can keep pace with rising seas by growing taller over time. At the oldest completed section, sediment has already built up, vegetation has returned, and oyster populations are thriving. "It's great that we can already talk about the benefits that it's providing," Hopkins said.

Based on reporting by the YCC Team for Yale Climate Connections. Read the original: https://yaleclimateconnections.org/2026/09/oyster-castles-to-help-keep-a-south-carolina-community-safe-from-erosion/