fish: the ordinary living creatures of sea, river, and lake, pictured as one broad class rather than named by kind
This is the everyday Hebrew word for a fish, and for fish as a whole. The Bible sorts living things into three broad realms, the creatures of the water, the birds of the sky, and the animals of the land, and this word names the first of those three. It covers any fish at all, from the catch in a net to the shoals that fill the sea.
Hebrew never names a single kind of fish. Where the Bible will name a particular bird or beast, fish stay one undivided mass, told apart only by a rule of thumb (fins and scales) rather than by species. That makes fish the picture of the far-off and the countless: creatures that live in a realm people barely enter, too many to number and beyond human reach.
The word travels through the whole story of Scripture doing steady work. Fish stand under human care in the creation blessing (Genesis 1:26, 28; Psalm 8:8). They multiply beyond counting, so much so that the image of teeming fish lies behind a blessing of many descendants. They die when the world is unmade in judgment: the fish of the Nile rot in the plague, and the prophets sweep fish away to show a ruin deeper than the Flood, which had spared them. They feed people (Numbers 11:5) yet are never offered in sacrifice, since they cannot be raised, owned, or brought to the altar alive. And they stand for helpless, leaderless crowds, caught in a net like people under a tyrant (Habakkuk 1:14; Ecclesiastes 9:12).
The word appears in two closely related forms. The plain form names a fish or fish in general; a paired form, feminine in shape, tends to mean fish gathered as a group, a catch, or a whole supply. The book of Jonah slides between the two forms for the very same great fish within three verses, which has drawn centuries of comment.
Disputed
Whether the noun "fish" is the original word and the rare verb "to multiply, teem" (used of Ephraim and Manasseh in Genesis 48:16) is a later play on it, or whether the verb is the parent root from which fish were named for their fertility.
- majorityThe noun "fish" is primary; the verb in Genesis 48:16 is a denominative wordplay drawing on the fish as a stock image of prolific breeding. This is the dominant view in current comparative Semitics.; HALOT (Koehler-Baumgartner), s.v. דָּג; Ernest Klein, A Comprehensive Etymological Dictionary of the Hebrew Language (Macmillan, 1987), s.v.; Alexander Militarev and Leonid Kogan, Semitic Etymological Dictionary II: Animal Names (AOAT 278/2, 2005)
- minorityThe verb "to multiply, teem" is the parent root, and fish were named from their fecundity.; Gesenius, Hebrew and Chaldee Lexicon (trans. Tregelles, 1857), 191-92; TWOT (Harris, Archer, Waltke, 1980), entry 401