This sure is one hell of an adaptive creature! Certain life forms are much more versatile living in extreme conditions. Perhaps with some genetic tinkering, the octopus & squid could live on other worlds. Then again, perhaps that's already what happened on earth.
https://en.wikipedia.org/wiki/Panspermia#Extraterrestrial_life
Of course many Sci-Fi stories feature ET creatures, but they aren't always necessarily a monster.
Just like sometimes there are digital monsters in a digital realm.
