What is Poseidon's primary weapon?

The story behind the answer

Trident is correct: as god of the sea, earthquakes, and horses, Poseidon wields a three‑pronged spear to churn the oceans, raise storms, and crack the earth—hence his title “Earth‑shaker.” Mythic tradition says the Cyclopes forged his trident (as they did Zeus’s lightning bolt and Hades’s