It is a severum, it is from a different region than other species of severum (there are already more than one you know) and the colour is consistent for this fish throughout its region. It is not dyed or cross-bred because it is wild and reproductively isolated. When a breeding population is reproductively isolated from others and begins to take on different traits, no matter how slight, that constitutes a different species, or at least subspecies. It hasn't been scientificially described yet so it may just be a subspecies, but generally when that is the concensus it will be noted, and in the Googling I have done on this fish it is not, so it will probably be recognised as a new species some day. The differences between species are not always drastic, have a Google and check out Betta albimarginata and Betta channoides. The two look almost identical, but they never meet in the wild and are divergent, that constitutes a species.
Seriously, you need to do some research before opening your mouth. Look up what makes a species a species. A lot of it is somewhat arbitrary, but there are some basic guidelines. It's not what they look like, I can guarantee you that much, which is what you seem to think.