Ph’nglui mglw’nafh Cthulhu R’lyeh wgah’nagl fhtagn!
In his house at R’yleh, dead Cthulhu waits dreaming…
…because of course his ancestral DNA was brought to Earth aboard an asteroid, as part of an ancient bombardment that seeded life…
Well, maybe not. It’s a controversial idea only in the sense that octopi are not aliens and no DNA can possibly have survived an asteroid bombardment hundreds of millions (or even billions) of years ago.
Still, asteroids seeding the universe is a fun idea for fiction writers. Which is the germ of my novel in progress…
https://qz.com/1281064/a-controversial-study-has-a-new-spin-on-the-otherworldliness-of-the-octopus/