Living Seawalls is a global initiative that aims to make seawalls, marinas and other hard coastal structures more hospitable to marine wildlife by installing biodiversity-friendly panels, boulders and pilings.In 2025, Ireland’s first Living Seawalls installation was established at Kennedy Pier in the port town of Cobh, and marine life is already starting to colonize the panels.While researchers say the panels can help marine life colonize hardened coastlines, and stayed cooler than standard flat seawall surfaces, questions remain about their effect on seawalls’ main function of keeping waves at bay, leading scientists to suggest that design modifications may be needed.
COBH, Ireland — On a bright, warm day in April in Cobh, Ireland, I step down a centuries-old cobbled slipway that descends into a harbor packed with fishing boats. Halfway down, something interrupts the weathered wall: an installation of 60 hexagonal concrete panels bolted into the stone. Some panels are ridged or textured; others are pitted with holes and crevices that either trap water or let it filter through with the changing tide.
Bright green algae drapes across many of the panels. When I look closer, I notice a few marine snails, including periwinkles (Littorina littorea) and dog whelks (Nucella lapillus), stuck to the tiles.
