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Artificial Reefs Transform WA Coastline
15 Sep
Summary
- Artificial reefs increased fish species from 12 to over 60.
- Ten-tonne concrete modules create crucial habitat and shelter.
- Reefs boost recreational fishing and coastal tourism.
Purpose-built artificial reefs installed off Western Australia's south-west coast have successfully transformed barren seafloors into vibrant marine ecosystems. Deployed in January 2013 near Bunbury and Dunsborough, these reefs utilized 30 heavy concrete modules per site. Each 10-tonne "Fish Box" was designed to create shelter, influence water movement, and improve feeding habitats.
Initially, only about a dozen fish species were present at the deployment locations. Within three years, the number of recorded species surged to over 60, a testament to the reefs' effectiveness. This transformation began with pelagic species like Samson fish within months, followed by demersal species and a rich array of algae and invertebrates.
The reefs' design mimics natural structures, offering cracks and cavities for marine life. By 2019, the Bunbury reef was expanded with 90 additional modules, further increasing its fishable area and habitat complexity. Monitoring in 2020 confirmed the presence of 58 diverse fish species.
Since the initial trial, Western Australia has established nine artificial reefs statewide, using over 1,000 modules and creating nearly 3,000 tonnes of new fish habitat. These projects benefit recreational fishing, boating, and tourism, contributing significantly to coastal communities and marine biodiversity.
