What was the purpose of animal cults?

These cults focused on an animal that was thought to house the soul of a god during its lifetime, and was revered until its death, when it was mummified with the soul migrating to another similarly marked creature.

Why did ancient Egypt worship animals?
Therefore, displaying their deities in the forms of animals, with particular characteristics, demonstrated what they believed about each god's nature. ... Other animals that were feared by ancient Egyptians, such as crocodiles and hippopotami, were revered and worshipped in order to protect them from their wrath.

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