Discovery BoxGenesis 1:18 
Context1:18 to preside over the day and the night, and to separate the light from the darkness. 1 God saw that it was good.
Genesis 1:21
Context1:21 God created the great sea creatures 2 and every living and moving thing with which the water swarmed, according to their kinds, and every winged bird according to its kind. God saw that it was good.
Genesis 1:25
Context1:25 God made the wild animals according to their kinds, the cattle according to their kinds, and all the creatures that creep along the ground according to their kinds. God saw that it was good.
1 sn In days one to three there is a naming by God; in days five and six there is a blessing by God. But on day four there is neither. It could be a mere stylistic variation. But it could also be a deliberate design to avoid naming “sun” and “moon” or promoting them beyond what they are, things that God made to serve in his creation.
2 tn For the first time in the narrative proper the verb “create” (בָּרָא, bara’) appears. (It is used in the summary statement of v. 1.) The author wishes to underscore that these creatures – even the great ones – are part of God’s perfect creation. The Hebrew term תַנִּינִם (tanninim) is used for snakes (Exod 7:9), crocodiles (Ezek 29:3), or other powerful animals (Jer 51:34). In Isa 27:1 the word is used to describe a mythological sea creature that symbolizes God’s enemies.
