The Asian arowana is a fish, a paradox, and an ongoing test of how commercial trade of an endangered animal could help conserve it.  

The fish, once a common food fish for locals from Cambodia to Indonesia, shot to stardom among pet fish enthusiasts and was hunted to rarity in rivers and lakes. But fish breeders learned to rear Asian arowanas in muddy ponds. Every year, hundreds of thousands of farmed Asian arowanas are exported worldwide, many of them from Malaysia.

(Feature image: A golden Asian arowana. | Photo by Eric Chiang/Macaranga)