There is little to be said about Waka-wakas in separating them from other Doodle-doods because there is little unique about them among Doodle-doods. If there were something unique about them, then they would be Glub-glubs. Waka-wakas are the common people on Doodle-dood World. They come in three categories: circular, rectangular, and triangular; but other varieties of Waka-wakas exist, such as elliptical, hexagonal, etc., although the dividing line between "Glub-glub" and "Waka-waka" is so fine that many of these simply refer to themselves as Cube Glub-glubs, Hexagonal Glub-glubs, or Triangular Glub-glubs. Even the standard (most common) circular Waka-wakas can be known as Generic Glub-glubs if they want a temporary change in title.
There is more to be said, though, in differentiating Waka-wakas from humans because all Doodle-doods are life-forms utterly different from anything native to Earth. We've only just recently observed an X-Ray Glub-glub (pictured below), which has done little to help, since it appears that Glub-glubs and Waka-wakas have no continuous skeleton to speak of.
While it's obvious that Glub-glubs have teeth, none of their other structures are recognizable from an Earth biology standpoint. Their legs are rigid and jointed, but have the same thickness throughout. Their arms are flexible and slightly extendable, and their hands can morph into any necessary shape. The rest of their bodies are perfectly round, but they can move their arms, legs, eyes, and mouths around rather freely. Perhaps most perplexing is the fact that no matter what angle you view a Glub-glub from, they have a constant, round, black outline.
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