A typical Chaoskampf, which is a storm god's battle against a sea serpent, representative of the clash between order and oceanic chaos.
Yahweh was the national god of the Israelites, but is originally from south of Canaan. As the Israelites moved from polytheism to monotheism they began to ditch the Canaanite gods, and during this period Yahweh absorbed attributes of the gods El and Baal-Hadad. This includes Baal's battle against the chaos serpent Lotan (Job 41), as well as El's white beard and the wisdom accompanying it. Both gods were associated with the bull, imagery that Yahweh seems to have absorbed at one point but was ultimately rejected (see: golden calf).