A Plug For St. Ick
Last year about this time, give or take, we released the first Foes collection of STL files. One of the monster types was "octopus." And a special model was good old St. Ick . . . that is, Santa Claus depicted as an octopus. It was just one of those things that you have to do, once you think of it. And for better or worse, we thought of it. And lo and behold, it was done. Ho ho ho.
St. Ick has a hat and a bag of goodies, and the $5 package includes two versions: one standing, one designed to be hung as an Xmas ornament. He meets or exceeds all your possible requirements for "octopus hanging from Christmas tree." If, that is, you have any such requirements.
So, if you have a 3D resin printer, please consider allowing our slimy saint to grace your holidays. There's still plenty of time to print him, paint him, and inflict him on your tree. Or that of a friend. If you have that kind of friends, and I hope you do.