Fish represent knowledge. Fish laid upon the fire, as in John 21:9, represent the reformation of the natural man by the good of love, of which description were all the men of that time, in consequence of the complete vastation of the church. Fish signify sensual affections which are the ultimate affections of the natural man. Fish sometimes also represent people in common truth or conversely in external falsity. Broiled fish, as in Luke 24:42, signify the truth of good relating to the natural and sensual man, and honeycomb, the good of the same truth. To make as the fishes of the sea, signifies to make altogether sensual. Fish, as in Habakkuk 1:14-16, signify people in faith separate from charity.

(References: Apocalypse Revealed 405; Luke 24)

Water generally represents “natural truth,” or true concepts about day-to-day matters and physical things. Since all water ultimately flows into the seas, then, it follows that a sea represents a huge agglomeration of such natural truths -- usually all of the natural truth a person has, or all the natural truth a church has. Water in the sea mixes freely, and is easily stirred up by winds and currents. This is also true of the concepts we hold about natural things -- they are not all related to each other, and when relationships do exist they usually can change without damaging the concepts themselves. Many of the concepts are easily disputed, and arguments can arise like waves on the ocean -- generally with little effect other than a mixing of waters. But the sea also offers great bounty. We draw fish from it (spiritual food), float ships (doctrinal systems) on it, bathe in it (using true concepts to purify ourselves), and the water that evaporates from it and falls as rain (purer forms of truth that can attach to desires for good) makes life possible.