Dagon

The Dagon Sphere was an orb that weakened the god Glory.
In the Pinky & The Brain episode "A Little off the Top", a Philistine soldier orders Samson to "bow before Dagon, our giant papier-mâché weasel god."
In Number 868 of the webcomic Questionable Content, Faye abandons a game of Battleship with Pintsize. Pintsize responds by shouting that the admiral has surrendered, and that all survivors of the "Faye Flotilla are sacrificed to Dagon!"
In the game Lost Magic, the Dagon is the greater form of the Hydra, a nautilus-like monster, only fire-type.
In the album The Chthonic Chronicles by the "British Cosmic War Metal" band Bal-Sagoth, there is reference to one such Dagon in the sixth track, Shackled To The Trilithon Of Kutulu.
In The Showdown's album A Chorus of Obliteration, the sixth track is named Dagon Undone - The Reckoning, and speaks of Israel's fight against Dagon, and the Philistines who worshiped him.
The 9th track on Therion's album "Sirius B" is titled "Call of Dagon".
In the video-game "The Elder Scrolls IV: Oblivion", the main antagonist, the Daedric Prince of Destruction, Change, Revolution, Energy, and Ambition is named Mehrunes Dagon.

Along with him are 2 others named Dagan and Dagnu.
In the anime series The Big O, the robot in episode 7 is named Dagon and went by the nickname "Sea Titan". Dagon was easily destroyed by Big O's Sudden Impact.
In the anime series Demonbane Dagon was an old evil god brought back to life using the R'yleh text, it was easily destroyed by Demonbane but not before having a long battle
In the video-game "The Witcher", Dagon is a deity that lives on the bottom of a lake.

The upper head lizard-like head is the vulnerable one.
In Devil May Cry 4, Dagon is a boss character, resembling a giant toad, that is fought by Dante (Devil May Cry).
H. Lovecraft, a horror fiction writer from the early 1900's makes many references to the South Eastern sea monster worshiped as a God.

His form is huge and grotesque, his followers make live sacrifices into the sea in order to appease him so he grants them an abundance of fish and ever-lasting life once they have completely transformed into similarly hideous creatures. There is also a movie taken from both stories appropriately called Dagon .