Thread:Disgustedorite/@comment-32744161-20181225000445/@comment-5642360-20181226155814

It doesn't need bones to be given that type of form. It could potentially just have an extremely contractile skin (or other tissue beneath it) which is also extremely durable. And then a layer of hydro-static skeleton (like the mesoglea of most cnidarians) trapped between two layers of said skin.

It's blob form could just easily be explained as being filled with air like a balloon. As it expels the air out, it flattens the body into a disc-shape and propel itself using propulsion not unlike that of a sea jelly.

The appearance of the two limbs and two eyes already suggest it isn't radially symmetrical. The most amount of slices you can make to form two identical pieces with would just be two.

Another idea that supports the bird blob as just a balloon is the argument of organs. Organs evolve in conjunction to the metabolic demands of the organism. If the organism was just primarily air filled and had only a small amount of systems to supply, then its body can accommodate by just having smaller lighter organs.

Or maybe, just maybe, the creators of the show made aliens that looked cool with no bearings to concrete logic behind them and that arguing with one another about the proper anatomy of it is completely moot when there are more ways than one where it can be anatomically correct.