Behold Mermaid Man and Barnacle Boy

Behold Mermaid Man and Barnacle Boy was an American animated action-comedy superhero television series, being created by Stephen Hillenburg. It was produced by United Plankton Pictures, Paramount Animation and Nickelodeon Animation Studios and it aired on Nickelodeon from March 3rd, 2007 until April 19th, 2014.

Synopsis
Set in the fictional show's universe, Mermaid Man and Barnacle Boy protect Bikini Bottom from extremely villainous threats.

Main

 * Mermaid Man (voiced by Ernest Borgnine until his death in 2012 and John DiMaggio afterwards) - TBD
 * Barnacle Boy (voiced by Tim Conway) - TBD

Supporting

 * The Chief (played by Martin Olson) -
 * The Sea Priestess (voiced by Olivia Olson) - a major fan of Mermaid Man and Barnacle Boy who becomes her own heroine as she attempts to impress her idols.
 * Tom Clubs (voiced by Yuri Lowenthal) - a friendly reporter who wants to get an interview with Mermaid Man and Barnacle Boy as he often fails.

Antagonists

 * Man Ray (voiced by Bob Joles) - TBD
 * The Dirty Bubble (voiced by Tom Kenny) - TBD
 * Atomic Flounder (voiced by Dee Bradley Baker) - TBD
 * Kelp Thing (also voiced Tom Kenny) - TBD
 * Sinister Slug (also voiced by Dee Bradley Baker) - TBD
 * Jumbo Shrimp (voiced by Clancy Brown) - TBD
 * Clam Head Candy Cad (voiced by Doug Lawerence) - TBD
 * The Moth (voiced by Mark Hamill) - TBD
 * Catfishstress (voiced by Sirena Irwin) - TBD
 * Monstah Lobstah (voiced by Rodger Bumpass)
 * Invisible Isopod (also voiced by Rodger Bumpass) - TBD
 * The Abyss (voiced by Tony Todd) - the most powerful and dangerous supervillain who wants to conquer the world no matter what.
 * The Siren (voiced by Tara Strong) - a seductive siren who tried to completely take control of Barnacle Boy's mind.
 * Cyborgman and Barnacleborg (voiced by Ernest Borgnine until his death in 2012 and John DiMaggio afterwards and Tim Conway, respectively) - two robotic dopplegängers of Mermaid Man and Barnacle Boy who were made to cause chaos.
 * The Big Whale (voiced by TBD) - a giant orca whale mob boss who is extremely flamboyant and loves throwing his riches around.
 * The Hive Queen (voiced by Ashley Johnson) - the queen of a race of parasitic sea slugs who wants to control everyone.
 * TBD

Trivia

 * Doug Lawerence reprised his role as Clam Head Candy Cad from the SpongeBob SquarePants episode, Mermaid Man and Barnacle Boy.