Barnacle Boy is a recurring guest character in the series Spongebob Squarepants. He is a hero, and the young ward to Mermaid Man. He was also brought out of retirement by Spongebob. He is an old and slightly forgetful hero, who is 68 years old according to Mermaid Man & Barnacle Boy V. He is sometimes treated like a child by Mermaid Man; this caused Barnacle Boy to temporarily join a league of super-villains with Man Ray and The Dirty Bubble in Mermaid Man & Barnacle Boy V. He has known Mermaid Man for over 65 years. He attitude is often more impatient compared to his warder, but is most often portrayed in a positive light. He, like Mermaid Man, lives in Shady Shoals Retirement Home, but the secret Mermalair in located under it.