Mystery of the Masks - Leviathan and Nisroch

Leviathan is a high-ranking demon in Satan's army and mentioned in the bible.
It is written in scripture that the Lord will slay Leviathan, the serpent of the sea, with His sword.
Leviathan is one of many pagan demon-gods painted on a mural of the Capital Dome in DC.
There, he is wearing the mask of Neptune/Poseidon.
To the Philistines, he was known as Dagon, the fish god.
Leviathan is an oracular demon and was the teacher of Buddha.
He is often depicted holding a trident.