This pile of cuttlefish shells was at the western end of Dep's Beach on the southern Fleurieu Peninsula. I stumbled upon them whilst I was on a late afternoon poodlewalk with Kayla and Maleko. I presume the shells had been collected and piled up by kids during the recent school holidays.
I came across the shells around the time of this excursion to Granite Island. The shells were packed up between the rocks in deep shade.