Octopus, by Sipho Mabona. It’s about 2 inches in diameter.
This model is a foray into “one-piece” origami. Or at least, I like to think of it that way because I usually use multiple pieces of paper. More specifically, this is the kind of advanced origami where they no longer give you instructions. Instead, they simply show a square with all the folds (a “crease pattern”). Check out the image below the cut.