Divers have observed just a ‘couple of dozen’ of the cephalopods along the heritage-listed Cuttlefish Coast in South Australia, causing locals and marine scientists to worry

Mid-June is usually the peak time for giant Australian cuttlefish to gather near Whyalla, in South Australia’s Spencer Gulf.

Nearly every year, they come in their thousands – and sometimes hundreds of thousands – to assemble in the shallows to breed. It’s a globally unique natural phenomenon, celebrated locally as “Cuttlefest”.

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