With what is the ancient Greek god Poseidon armed?

Good to know that Poseidon can Create spring by his Trident

Sheldon Cooper’s fear of unusual forks. He didn’t want a fork with three tines because it was a trident. Great show!

Meeker, a giant fish fork .... with 3 tines :> I was imagining nunchux in the water

Meeker, Google Poseidon, tap "Image".

So, without an explanation in the answer, what IS a Trident, for those who don't follow Greek history.

His son>>> (Percy Jackson)