Barnacle Boy is one of the semi-retired superheroes of Bikini Bottom from SpongeBob SquarePants, the other being Mermaid Man. They are the favorites of SpongeBob and Patrick and both live in a retirement home doing things retired people do. While being on superhero duty, fighting off villains including Man Ray (arch-nemesis) and Dirty Bubble (second arch-nemesis).

He was voiced by the late comedian Tim Conway.


Barnacle Boy is depicted as being the under-credited and underappreciated younger sidekick of Mermaid Man. Grumpy and slightly ill-tempered, Barnacle Boy is notable for his brooding, moody disposition and exasperation with his partner's absentminded behavior as a result of old age, and even into his golden years, Barnacle Boy is still treated in a juvenile fashion, coddled in an infantile way.


"Stop calling me boy."
~ Barnacle Boy
"That's Barnacle Man."
~ Barnacle Boy



  • They are a parody of the following superheroes:
    • Aquaman and Aqualad cause of their appearance similarities.
    • Batman and Robin because their action and adventures are based on the first show.
  • Young Barnacle Boy was voiced by Burt Ward (who also portrays Robin in the 1966 live-action television series of the same name).
    • Incidentally, Young Mermaid Man was voiced by the late Adam West, Burt Ward's co-star on the live-action series as Batman.
  • Mermaid Man is about 5'9 and 225 lbs while Barnacle Boy is about 5'6 and 160 lbs.
  • In Mermaid Man's early appearances, his belt is yellow (similar to the Silver Age Aquaman's belt), but in his later appearances, his belt is purple with a metallic-blue M.
  • His real name is based on his voice actor.


           SpongeBob SquarePants Logo Heroes

Main Heroes
SpongeBob | Patrick | Squidward | Mr. Krabs | Sandy | Mrs. Puff | Pearl | Gary | Plankton | Karen

Movie Heroes
King Neptune | Princess Mindy | David Hasselhoff | Bubbles

Other Heroes
Mermaid Man | Barnacle Boy | Angler Fish | Beatrice | King Krabs | Mystery | Larry the Lobster | SpongeBuck | SpongeGar | SpongeTron | The Wise Old Crab

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