Old, retired and foolish superheroes who are adored by Spongebob and Patrick.
Mermaid Man is a semi-retired superhero. He is voiced by Academy Award-winning actor Ernest Borgnine (in the series).
Mermaid Man is a semi-retired superhero who has aged well past his prime. His costume mostly resembles the costume of the comic book hero Aquaman, with the addition of a star-shaped mask, a scallop-shell bra, and a pair of fuzzy slippers. Mermaid Man's underwater lair and method of crime fighting is a parody of Batman, and his "invisible Boat-Mobile" is a parody of both the Batmobile and Wonder Woman's invisible jet. It is unknown how he can live in Bikini Bottom, as he, along with Barnacle Boy, are the only true humanoid characters on the show (although he could be Atlantean or otherwise super-powered). He has an obsession with the word "EEEEVVIIILLLLLL!"
Much like the heroes he is based on, Mermaid Man also has a sidekick, Barnacle Boy, who he treats like a child even though Barnacle Boy is sixty-eight years old. Mermaid Man appears to be in the advanced stages of senility, often forgetting what he was talking about, or what he was doing. This is not a problem for SpongeBob and Patrick, who unconditionally adore the two heroes and managed to coax them out of retirement and back into television. SpongeBob has appeared with them in eight different shorts — often involving a supervillain, a supergadget, or some combination of the two. In one episode, he and Patrick made a film about the heroes.
Mermaid Man has several nemeses that he fought long ago. Dirty Bubble, a sentient dirty bubble. Man Ray, a humanoid with a stingray themed costume who does evil things and was frozen in the Mermalair. Atomic Flounder, a fish who can shoot nuclear blasts from his mouth. And the Moth, a humanoid moth who steals light and according to Mermaid Man, he has been searching for the Moth for 57 years.
Mermaid Man enjoys watching television and playing checkers with Barnacle Boy. He eats almost anything. His favorite foods are meatloaf, mashed potatoes, broccoli, Krabby Patties and ice cream.
According to Mermaid Man, his powers are all in his costume. He uses abilities similar to Aquaman's such as: summon and control sea creatures, high speed swimming (used to create an effect dubbed the Raging Whirlpool), water balls, and the ability to survive underwater. While Mermaid Man retains all of these abilities, they are not as powerful as they were in his prime. Also, Mermaid Man has Super Telescoping Vision according to a scene cut from the storyboards of Mermaid Man and Barnacle Boy V.
In addition to this, his belt houses a wide array of various weapons, most commonly seen as some kind of beam or ray. The only one named on the show is the Small Ray which shrinks things, but various effects were created when Spongebob used the belt on Squidward trying to reverse the Small Ray's effects. His belt feaures other powers such as Building Obliteration Button, Chin Cam, and various radioactive beams that cause bizarre mutations and various effects to the subject, such as causing them to suddenly catch on fire, turn inside out, or to be cut in half by scissors. They are only briefly shown, all afflicting Squidward. This seems to be a reference to both Batman and Space Ghost.
Eye Color: Black
Interests: Crime Fighting, watching television