Paroon Shark

About

The paroon shark (Pangasius sanitwongsei) is one of those species that really should not exist in the hobby at all, and saying that plainly is more useful than dancing around it. Native to the Chao Phraya and Mekong river systems of Southeast Asia, this is one of the largest freshwater fish in the world, second in the family Pangasiidae only to the giant Mekong catfish. In the wild, adults cruise vast river channels while juveniles push into larger tributaries. We are talking about a migratory, wide-ranging animal built for enormous spaces. The problem in the trade is that juveniles show up as silvery, fast-moving little fish of two or three inches that look perfectly manageable in a shop tank. They are not. Even in captivity, where fish rarely approach their maximum recorded size, paroon sharks routinely reach several feet in length over a lifespan that can stretch well beyond a decade. The species is carnivorous, feeding on fish, crustaceans, and in larger rivers, opportunistic scavenging. Breeding in home aquaria is essentially impossible given the migratory spawning triggers and the sheer scale of mature fish. Conservation concerns add another layer. Wild populations face pressure from overfishing, habitat degradation, and pollution. If you spot one for sale, the kindest thing is to leave it there.