The national fish of Pakistan is the Mahasher also known as Mahseer.
According to the provided reference, the Mahasher/Mahseer is not only the national fish of Pakistan but is also known as the "King of Swat."
Here's a breakdown of the key information:
- National Fish: The Mahasher/Mahseer is officially designated as the national fish of Pakistan.
- Common Name: It is also known as Mahseer.
- Regional Significance: In the Swat region, it is popularly referred to as the "King of Swat."
This makes the Mahasher/Mahseer an important part of Pakistan's natural heritage.