According to genesis, what command does god give to the sea animals and birds he creates?

According to Genesis 1:20-22:

20Then God said, "Let the waters teem with swarms of living creatures, and let birds fly above the earth in the open expanse of the heavens." 21God created the great seamonsters and every living creature that moves,with which the waters swarmed after their kind,and every winged bird after its kind; and Godsaw that it was good. 22God blessed them, saying, "Be fruitful and multiply, and fill the waters in the seas, and let birds multiply on the earth."

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