# Birthmark

<figure><img src="/files/Kwuw7TRIpFICWaGrlefQ" alt=""><figcaption><p>Description of SeaCrypt birthmark</p></figcaption></figure>

During the minting process, users are required to enter "<mark style="color:blue;">**birthmark**</mark>" phrases. \
There are two objectives of the birthmark:

* <mark style="color:blue;">**Seed in determining fish generation**</mark>\
  The birthmark **plays a role in how a fish model is generated**. In other words, it is impossible to generate two fishes that look exactly the same.
* <mark style="color:blue;">**Memory storage in fish eyes**</mark>\
  Birthmark phrases will be carved into the eyes of the fish (permanently) when a fish is minted. <br>


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```
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```

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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.