An angry (or sulking) tribble lamp? I couldn't have that lampshade in my house, it collects too much dust, but an impressive DIY anyway. By unknown, found via Painted by Prestige.
I was looking something like this just last month: a simply shaped DIY lampshade with (nerdy) art of your choice. Tutorial by Kat & Cam at Our Nerd Home. If you can't find a suitable box commercially, it takes more effort to make one yourself, of course, but shouldn't be overwhelming.
Something this handsome should hang in adult spaces as well even if it's marketed as a nursery or kid's room light. Fish lampshade by VasiliLights on Etsy. Found via Colossal.