Rahab, in these passages, takes the meaning of primeval, chaotic, multi-headed sea-dragon or Leviathan.
Job 26:12 The Babylonians told of a sky-god, Marduk, and a sea-goddess, Tiamat, battling for supreme power over the other gods, in the Enūma Eliš.
[3] There is a possible connection between the monster Rahab and the fragmentary attested Akkadian chaos-dragon Labbu.
Rahab represents the primordial abyss, the water dragon of darkness and chaos, comparable to Leviathan and Tiamat.
[11] In the video game Legacy of Kain: Soul Reaver, the boss character Rahab is a vampire who has evolved into a marine fish-like creature, possibly a reference to the mythic sea monster.