As has been stated, 'fish' means facts, here facts quickened and brought to life through faith from the Lord. 'Sea monsters' means those facts' general sources, below which and from which details derive. Nothing whatever exists in the universe that does not depend on some general source for its commencement and continuance. In the Prophets sea monsters or whales are mentioned several times, and in those places they mean those general sources of facts. Pharaoh, the king of Egypt, who represents human wisdom or intelligence - that is, knowledge in general - is called 'a great sea monster', as in Ezekiel,

Behold, I am against you, Pharaoh king of Egypt, the great monster lying in the midst of his^a rivers, who has said, It is my river and I have made myself. Ezek 29:3.

[2] And elsewhere in Ezekiel,

Raise a lamentation over Pharaoh, king of Egypt, and say to him, You are like a monster in the seas, and you have come forth in your rivers, and have troubled the waters with your feet. Ezek 32:2

These words mean people who wish to penetrate the mysteries that are part of faith by means of facts, and so from themselves. In Isaiah,

On that day Jehovah will make a visitation with His hard and great and strong sword upon Leviathan the full-length serpent,^b and upon Leviathan the twisting serpent, and He will slay the monsters that are in the sea. Isa 27:1.

'Slaying the monsters in the sea' means preventing people's knowing facts even in their general aspects. In Jeremiah, Nebuchadnezzar king of Babel has devoured me, he has troubled me, he has made me an empty vessel, he has swallowed me up like a sea monster, he has filled his belly with my delicacies, he has cast me out. Jer 51:34.

This stands for the fact that mankind did swallow cognitions of faith, which are 'the delicacies' here, just as the sea monster swallowed up Jonah. In that story the sea monster stands for people who treat general cognitions of faith as mere facts, and behave accordingly.

Notes