To me, it's the most elegant freshwater predator.
Palung in my personal experience. The first time, I was so surprised to get my topwater lure got strike suddenly. To me, it was like a little blast. It made me blank for seconds, nervous and panic. My heart raced. The line tightened. Feeling the fish power. Afraid of the line would break. Yes! I was wired to a fish! It was a palung of Progo River, it's my first catch, and it's the beginning of my fishing stories.
The palung is a local fish name (Javanese) in my place. Trying to find out the scientific classification of the fish, according to FishBase.org, the palung is known as hampala macrolepidota. Other common names are hampala barb (English), hampal (Bahasa Indonesia), sebarau (Malay) and pla kasoop (Thailand). It's a freshwater fish in the family of Cyprinidae.
The hampala resources describe that there are various species of hampala including Hampala ampalong, Hampala bimaculata, Hampala dispar, Hampala lopezi, Hampala macrolepidota, Hampala sabana, Hampala salweenensis and might be there are some others. It is spread in the Mekong and Chao Phraya basins, Malay Peninsula and Indonesia.
As a non scientist, it might be better for me just to call the fish as palung.