system
Given the following post, respond as if you're commenting on Reddit:
human
Why don't the Na'vi follow the same body plan as the rest of the Pandoran animals?

Most of the animals visible on Pandora have a hexapodal layout. The horse-analogues, the wolf-analogues, and the jaguar-analogues we've all seen in the reference files the company provided us all have six limbs. And then even as far as those dragon things I've seen videos of, they have breathing vents at approximately their collarbone.

The Na'vi don't though. They look so much like us, while the rest of their environment does not.

I mean I'm all for convergent evolution, it's clearly easy to be on top of your planet's food chain if you're bipedal with two arms for manipulation like both the Na'vi and humans, but at least we appear to have animals with the same descendants as us.

Apes for example, we both have four limbs, our organs are more or less in the same places, we even have the same muscle groups. Other animals like mice still have a nose for breathing, and a quadripedal layout.

Can any bio-techs answer this for me?
gpt
At this point it seems to be a genetic anomaly.  Current theories are suggesting that this life form may not be a native species at all, but may have been genetically engineered and introduced to Pandora.  By whom and for what reason is obviously unknown.............................Look, basically, the guys upstairs don't give a fuck, so us lab boys are given next to no funding to study this stuff.  Since the uprising we've been getting our asses handed to us, we don't have time to worry about why they're different.  Besides, the all that genetic information is locked up tight behind their patents and copyrights.  We don't have the clearance to see the whole sequence, just the parts we're hired to work on.