- Although this character was originally introduced during DC's Earth-One era of publication, their existence following the events of the 1985–86 limited series Crisis on Infinite Earths remains intact. However, some elements of the character's Pre-Crisis history may have been altered or removed for Post-Crisis New Earth continuity, and should be considered apocryphal.
- Enemy of the Sea Devils and the Forgotten Heroes.
- 6 Appearances of Mister Poseidon (New Earth)
- 3 Images featuring Mister Poseidon (New Earth)
- Quotations by or about Mister Poseidon (New Earth)
- Character Gallery: Mister Poseidon (New Earth)
Secret Society of Super-Villains member
|Forgotten Villains member|
This character is or was a member of Forgotten Villains, a group of criminals who banded together to conquer the universe.