Protected species
As is so typical with many political decisions in this country, yes. But it is overkill. The US is one of the few prohibiting importation of this species. I'm hoping somebody from Canada chimes in. In the wild, the numbers are fairly stable, but all for sale are bred in captivity. Tons of captive born Arowanas.
It's big business in Asia. None born in captivity are released, yet if the few countries outlawing the importation coughed up some cash for a release program or at leased helped with breeding, this animal could be as plentiful as cops in a donut shop.