trident Click to see full answer. In this manner, what is Poseidon’s symbol called?Poseidon’s most common symbol was his trident. His trident was his weapon. He used it to create storms, earthquakes, floods, and tidal waves. The trident also showed Poseidon’s power.Subsequently, question is, what myth is Poseidon in? Today’s story is about Poseidon, god of the sea and brother to the almighty Zeus. Poseidon is the god of the sea. He has two brothers named Hades, the god of the underworld, and Zeus, the almighty god of the earth. He carries a trident, which is his main weapon, and is said to be the inventor of horses. Secondly, what is Poseidon afraid of? According to a little research that I’ve done not so long ago, Poseidon and most of the Olympian gods fear Zeus after they had ambushed him during his sleep and tied him up. Because of this I dare to say that a thing for which Poseidon is scared of, is Zeus’ anger and ability of limiting powers.Why is the trident a symbol of Poseidon?Answer and Explanation: Poseidon wields a trident because it is a focus for his power and a symbol of his authority over the seas.