The earth was formless and void or a waste and emptiness, and darkness was upon the face of the deep [primeval ocean that covered the unformed earth]. The Spirit of God was moving (hovering, brooding) over the face of the waters.

By the word of the Lord were the heavens made,
And all their host by the breath of His mouth.

You send out Your Spirit, they are created;
You renew the face of the ground.

The crooked serpent

You divided the [Red] Sea by Your strength;
You broke the heads of the sea monsters in the waters.

In that day the Lord will punish Leviathan the fleeing serpent
With His fierce and great and mighty sword [rescuing Israel from her enemy],
Even Leviathan the twisted serpent;
And He will kill the dragon who lives in the sea.

And the great dragon was thrown down, the age-old serpent who is called the devil and Satan, he who continually deceives and seduces the entire inhabited world; he was thrown down to the earth, and his angels were thrown down with him.

General references

So God made the wild animals of the earth according to their kind, and the cattle according to their kind, and everything that creeps and crawls on the earth according to its kind; and God saw that it was good (pleasing, useful) and He affirmed and sustained it.