Australian giant cuttlefish are the largest in the world. And at this time of year, they do something unusual – they abandon their solitary lives to gather in their thousands in the shallow waters of the upper Spencer Gulf of South Oz. That’s the slice out of the state’s coastal stretch at the eastern end of the Great Australian Bight, and it’s home to Port Lincoln, Whyalla, Port Pirie, and Port Augusta. Experts say they don’t know how far they travel or why they’ve chosen that place to party, but they only have one thing on their cephalopod minds… The technical term for what’s happening is a “mass spawning aggregation”, and when it comes to cuttlefish, it’s the only one on Earth. This year, more than 137,000 of ‘em have rocked up – that’s after numbers sunk to 13,000 in the recent past, resulting in a ban on fishing them in the area. As for what’s going down, it’s a ladies game… There are many more females than males, so the blokes had better bring their A-game with bright colours and a dance to impress a mate.