I came across an image of someone's origami through Facebook. It looked really fascinating. The units used to make it are called fishtail curlers. The base is folded, but then the ends are curled. The units are assembled by locking these curls together. I made another kusudama out of normal curler units before, so I knew how this one worked. Just some different folds for a different shape.
I used this diagram from this website here: http://kusudama.me/origami/gallery/Curler/Fish_curler.png%20