@rogward include links please. https://deshinewspost.com/see-the-best-fossil-octopus-ever-found/ (which itself is copy of https://www.scientificamerican.com/article/see-the-best-fossil-octopus-ever-found/) And, pictured fossil is 165 million years, not 296. Though there does seem to have been a 500 million year ancestor identified: https://www.livescience.com/ancient-octopus-relative-fossil.html