There go the ships: there is that leviathan, whom thou hast made to play therein.
Psalm 104:26 KJV
The sea is symbolic of darkness and the leviathan (the devil) was made for it. Jesus affirms this when he said:
You are of your father the devil, and you want to do the desires of your father. He was a murderer from the beginning, and does not stand in the truth because there is no truth in him. Whenever he tells a lie, he speaks from his own nature, because he is a liar and the father of lies.
John 8:44 NASB
He was never a creature of light, his nature from the beginning was dark i.e. from the start he was a murderer, a liar.

You’re probably wondering. Why? God has always given mankind a choice. He warned us not to touch and told us what would happen if we do ☠️. He implored his people in Duet 30:19 to chose life i.e. chose him. But like Adam, we chose death.
Thankfully, the LORD promised to defeat the leviathan, and in so doing defeat death:
In that day the LORD with his sore and great and strong sword shall punish leviathan the piercing serpent, even leviathan that crooked serpent; and he shall slay the dragon that is in the sea.
Isaiah 27:1 KJV

In Christ ✝️ the promise is fulfilled.
From the beginning, Leviathan was made for the sea, whereas, from the beginning, God gave man dominion over it. Christ calls us to walk on the waters of the sea with him. For it’s only in walking with him ✝️ are we abiding in the place God desired for us from the beginning, to be with him. In that place, the sea is forever under our feet.