some research showed that the redish eyes of the natts is very not often observed in the wild. the red of the eyes comes from the fact that they have, when raised in tanks, clear eyes and we actually see the color of blood running through their eyes; it is not the actual color of their eyes (as opposed to s. rhombeus or elong) but just the fact that they're clear. in nature, since the water is so cloudy and full of small parts floating, they develop a sort of extra layer over the eye that makes it less transparent. that would explain why caribe and piraya have white eyes, because they can't breed in aquariums and are therefore all wild caught (except some rare caribe breeding ponds in the south).
just a piece of info here, but your natts seem to have white eyes and a particularly developped lower jaw. don't forget that natteris are found all over the amazon river, and therefore are not exactly the same all over the river. just think of s.rhombeus that has so many differences going from one region to another.
i'm not saying that they're wild caught, but i'm saying that we shouldn't take for granted that they're not.
my bet would be that they are, but it is sometginf EXTREMELY hard to say. botomline, you have nice looking Ps bro, thats all that matters!
aight peace