The giant cuttlefish’s technicolour mating display is globally unique. The SA algal bloom could kill them all
- Written by Zoe Doubleday, Marine Ecologist and ARC Future Fellow, University of South Australia

Every year off the South Australian coast, giant Australian cuttlefish come together in huge numbers to breed. They put on a technicolour display of blue, purple, green, red and gold, changing hues as they mate and lay eggs.
This dynamic, dreamlike display takes place in the upper Spencer Gulf, near Whyalla....