In the late Holocene, Tasmania Aboriginal peoples faced significant challenges in rising sea levels and changing resource economies. However, rather than a deterrent, the peoples thrived with new resources and Tasmania stands alone as possessing the richest maritime archaeological material in the world. Critical marine resources have not only shaped the physical landscape of coastal Tasmania, but have given rise to the cultural connections of Tasmanian Aboriginal peoples. Midden living places are under threat from sea level rise, yet these knowledge stores have not been investigated for their historical riches, such as species change over millennia, or recognised as markers to determine rates of sea level change. Before our precious culture is washed away, midden living places should be acknowledged as a powerful source of belonging and adaptation.