Shellfish reef loss has contributed towards a decline in key ecosystem services, including nutrient processing. Improving nutrient processing by enhancing shellfish filtration is the principal objective of shellfish reef restoration in the North Pine River, Queensland. Restoration consisted of 40 OzFish designed robust oyster baskets (ROBs), with 20 seeded in central Moreton Bay to encourage initial oyster growth and 20 having no existing shellfish growth. Over time, the side walls of the seeded ROBs rusted away, resulting in unit failure. In direct contrast, the unseeded ROBs were colonised significantly with invertebrates; principally estuarine mussels. Mussels were comprised of 13.5% (+/-1.6 SE) carbon and 1.4% (+/-0.4 SE) nitrogen, equating to approximately 2.8 kg (+/- 0.35 SE) of carbon and 294 g (+/-38 SE) of nitrogen being stored per ROB. We identified 7 times higher carbon, 11 times higher nitrogen and 7.2 times higher organic matter content in deep sediment under the ROBs than at the control sites, corresponding to 67.5 g of additional nitrogen and 580 g of additional carbon being stored. We also report changes in fish assemblages at and around the restored reef, corresponding to changes in fisheries values. Two further sites are to be restored in 2025.