Almost correct.
That's actually a black pacu, not the red belly pacu more commonly seen in the hobby. The blacks are about a foot longer than the reds, and I assume more difficult to keep.
Pacu are rewarding if you can invest in keeping them alive. I have three in a 260 gallon tank, and they are happy and healthy. If you don't have thousands to blow on enormous tanks, stay away from the pacu.
-MrBoB