How do you kill a tree octopus?

You start out by getting a spear gun. Yes, I realize this may sound a tad drastic, but it's what needs to be done. and then you go outside, VERY, very carefully, sneak up on it if you will, and then shoot the spear gun. DON'T MISS. *in the event in which you do miss: run, hide, and then in an hour, try again.* When you shoot, aim for the heart. It should be dead immediately, but just in case, you need to dig a hole in the ground, set the tree octopus on fire, and then bury it after it is turned to ash. *if they have eggs, you can eat those, they're very tasty.