September 8, 2021
Spencer Gulf in South Australia hosts the world’s largest cuttlefish mass spawning event.
Each winter from May to August, thousands of Australian giant cuttlefish (Sepia apama) make their way to False Bay, northwest of Adelaide along the coast of South Australia. In this bay at the head of Spencer Gulf, the chilly water and rocky seafloor provide prime conditions for the largest known mass spawning event, or “aggregation,” of cuttlefish in the world.
Growing to nearly a meter long, the Australian giant cuttlefish is the largest of these unique cephalopods. With special skin cells called chromatophores, cuttlefish are …