Chili Red Arowana

Rarity will be the biggest factor. Consider this however. Typically as a marketed fish, your RTG's and Blood or Chilli Red's are going to command the biggest prices. Several factors are involved here.

The beauty and splendor of these fish are another factor. They are generally kept and bred in large outdoor ponds. Being an endangered species, it's rather important to ensure the survival of each particular group. In Asia itself, through culture, the red and gold colors symbolize luck and prosperity, and thus have a higher local value.