Every winter thousands of giant Australian cuttlefish congregate in SA. They are expert colour-changers and masters of camouflage, and can change shape and texture to look like rocks, sand or seaweed – a spectacular sight to see. Giant Australian cuttlefish congregate off the coast of Whyalla in South Australia, along a 10 km stretch of the Upper Spencer Gulf Marine Park. Cuttlefish numbers usually increase throughout May and peak in June and July when the breeding season is in full swing.