A concrete marine habitat substrate tile that is portable for a human and which provides an increased calcium carbonate content and interstitial spaces for feeding and providing a habitat for developing oysters is described. Specifically provided is a reef restoration and oyster growing tile comprising: a concrete tile comprising at least 25% by weight calcium carbonate； wherein the concrete tile comprises a base and a surface disposed on the base and comprising a plurality of spaced projections and interstitial spaces； and wherein the plurality of spaced projections and interstitial spaces provide a 3-dimensional surface.
