What is the stem of "there is a kind of fish called Kun Kun in Beiming, which can't be stewed in a cauldron"? Where is the source?

What is the stem of "there is a kind of fish called Kun Kun in Beiming, which can't be stewed in a cauldron"?

Interpretation of meaning:

There is a kind of fish called Kun Da in Beiming, which is the content of Zhuangzi Xiaoyao Tour. Later, it was adapted into various online jokes by netizens, and it was said that one pot can't be stewed.

Source source:

A joke from the internet, the original joke is that there are fish in the north, and the name is Kun, which is too big to stew in one pot! Become a bird, its name is Peng, and Peng's size requires two barbecue grills. A secret recipe, a slightly spicy, a bottle of snowflakes, let's brave the world!

Usage scenario:

All kinds of jokes and lively scenes

Example:

What to eat tonight?

B: Kunkun in the north of China is half secret and half spicy.