Why did the Taoist priest let me put snakehead?

Although it has been two years, I really can't stand looking at the answers upstairs. There are four gates: no cows, no dogs, no geese and no mullet. If the Taoist priest asked you to release snakehead, that should be what he meant. Snakehead is mullet, not snakehead. The mother of snakehead can't make up for food for a period of time after giving birth. The ancients in China thought that it was filial piety for the little black fish to get into his mother's mouth and feed her. Therefore, these four animals represent loyalty, righteousness and filial piety in traditional culture, especially for Taoist people.