Then God said, “Let the water swarm with swimming creatures, and let birds fly through the sky over the earth.” ²¹ So God created the large sea creatures, every type of creature that swims around in the water and every type of flying bird.  God saw that they were good. ²² God blessed them and said, “Be fertile, increase in number, fill the sea, and let there be many birds on the earth.” ²³ There was evening, then morning—a fifth day.
(Genesis 1:20-23 -- GW)