We know of the giant squid through a pittance of washed-up carcasses and from beaks recovered from the stomachs of sperm whales, its only known predator. We've never directly observed them alive, so they remain a mystery. Given how smart smaller octopi and squid can be, one has to wonder if the big-brained giant is avoiding us because it knows better.
Cephalopods are the aliens on Earth.
The most entrancing cephalopods are the giant cuttlefish and the mimic octopus, which are creatures that come with virtual reality as a built-in feature. They can project patterned images on their skin and change shape like a special effect from Industrial Light and Magic. The ultimate cyber fantasy, they communicate with each other and their environment by morphing. I am inconsolably jealous of their abilities. But their cousin the giant squid is the Zeus of the alien Pantheon.