Here is a little info I found:
'Paroon' is the correct spelling for the common name of these fishes, which are scientifically named Pangasius sanitwongsei. Despite their superficial resemblance, this South East Asian catfish species has absolutely no relation to sharks.
The Paroon has been available in Norwegian aquarium shops since the mid 1980-ies, but it is still a fairly rare species in the trade. "Luckily", I would say, since it is a species that is extremely demanding if you want to make sure that it will do well in an aquarium. It is tempting to buy on impulse when you spot the fascinating little Paroons of only 8 to 10 cm (3-4 inches) length in a shop. Beware though, that these are babies, in the true meaning of the word. Fully grown, the Paroon will reach at least 1 meter (3.3 feet) in length, possibly even much more.
It will not take long for a Paroon to outgrow most aquaria. In order to give it even fairly acceptable living standards, it must have an aquarium of at least 250 cm (8 feet) length, preferentially more. The Paroons are swift and jumpy swimmers that easily get injured in collisions with the aquarium walls.
The Paroon is practically omnivorous and accepts many different kinds of substitute foods, including dried foods. It does, however, hold a preference for coarser fresh food, like shrimps and fish meat. As it gets bigger, you must expect that it will eat many smaller fishes in the aquarium.
Optimal water quality is GH = 2 to 15 ºdH; pH = 6.5 to 7.0; and temperature = 22 to 28 ºC (71.5 to 82.5 ºF).
