Yes they do. Every living thing does. Even plants do in their own way.
I keep Fish, shrimp, snails, and isopods and they all do too. Fish and shrimp actually poop quite a lot, especially the latter. I don't think I could ever eat shrimp after seeing how many turds those things produce.
That article is really fuzzing up the definition of "poop," I'd argue over half those entries are just how the thing poops weirdly. I guess if you get into semantics it may be technically true but I just consider pooping to be eliminating bodily waste so to me that whole article is like, "look how oddly these things poop." 😅