What do you mean by putting mullet?

In Buddhism, there is no explanation of what animals to put. These were written by later generations themselves, not the teachings of the Buddha.

The merits of releasing animals are classics written by later generations, and these classics are mainly based on the theory of' merits'. Although releasing is a kind of kindness, it only helps you. Because liberation cannot relieve pain, the Buddha's teaching is mainly about liberation.

Nowadays, fortune tellers all combine the life-changing theory of Buddhism. Fortune-telling depended on fate. Therefore, the significance of his letting you release two mullets should be to let you do some merits and prevent some disasters. But the practical significance is a superstition.