Giant Southern Cuttlefish in the Gulf of St Vincent

Giant Southern Cuttlefish head to South Australia due to higher salinity levels, which helps their eggs survive in the Gulf of St Vincent. They do have an amazing ability to stay underwater for minutes at a time. Highly recommend watching my octopus teacher on Netflix. But why aren't they finding happiness with their biological family, spouse, children, et cetera? If that's their only way out, you know, I've got sympathy for them. With an octopus.