Snakehead fish: also known as black snakehead, black snakehead (caiyu), snakehead snakehead has a life span of more than 100 years, and is the longest-lived fish among freshwater fish.

The vitality of snakehead fish is very strong, ranking first among freshwater fishes. Someone has done experiments and found that snakeheaded fish can survive for half a month if placed on moist and cool land. Because ordinary fish can only absorb oxygen dissolved in the water, black fish can also directly absorb oxygen in the air. With this "special function", when there is no rain for a long time, the lake will be flooded. When dry,

it can hibernate like some animals, that is, it will sit in the mud with its tail facing down, leaving only its mouth

exposed to the mud. Above the surface, snakeheaded fish are commonly known as "sitting on the prong" or "sitting on the escape". This is the "dry sleep" of snakeheaded fish.

At this time, it is in a state of torpor, which can last for several weeks. The snakeheaded fish will return to normal life when it comes to the water again.