That's good, and thanks for clarifying.
I would consider a "high quality" animal one that represents traits of the locality it is from.
For instance, Nick Mutton's Brisbane, locality coastal carpets.
On the other side of that coin, I'd also consider very selectively bred morphs high quality, if the breeder had been working years for certain traits.
In this case I believe the O/P was looking for ideas as to what species the snake was. Coastal, coastal/jungle mix, IJ, or Darwin or diamond.
Whether or not the quality of the snake was in question is something I don't believe the O/P was asking about.
But I understand your point in trying to describe the animal, I misunderstood your post.