Gen 1, 20-23 God created all kinds of swimming creatures

(Gen 1, 20-23) God created all kinds of swimming creatures

[20] Then God said, "Let the water teem with an abundance of living creatures, and on the earth let birds fly beneath the dome of the sky." And so it happened: [21] God created the great sea monsters and all kinds of swimming creatures with which the water teems, and all kinds of winged birds. God saw how good it was, [22] and God blessed them, saying, "Be fertile, multiply, and fill the water of the seas; and let the birds multiply on the earth." [23] Evening came, and morning followed - the fifth day.

(CCC 297) Scripture bears witness to faith in creation "out of nothing" as a truth full of promise and hope. Thus the mother of seven sons encourages them for martyrdom: I do not know how you came into being in my womb. It was not I who gave you life and breath, nor I who set in order the elements within each of you. Therefore the Creator of the world, who shaped the beginning of man and devised the origin of all things, will in his mercy give life and breath back to you again, since you now forget yourselves for the sake of his laws… Look at the heaven and the earth and see everything that is in them, and recognize that God did not make them out of things that existed. Thus also mankind comes into being (2 Macc 7:22-23, 28). (CCC 298) Since God could create everything out of nothing, he can also, through the Holy Spirit, give spiritual life to sinners by creating a pure heart in them (Cf. Ps 51:12), and bodily life to the dead through the Resurrection. God "gives life to the dead and calls into existence the things that do not exist" (Rom 4:17). And since God was able to make light shine in darkness by his Word, he can also give the light of faith to those who do not yet know him (Cf. Gen 1:3; 2 Cor 4:6).