Barnacle Bill (released in the U.S. as All at Sea) is a 1957 comedy, starring Alec Guinness, playing an unsuccessful navy man as well as six of his maritime ancestors.
Barnacle Bill is a 1930 Fleischer Studios animated short film. It was part of the Talkartoons series, and featured Betty Boop (here known as Nancy Lee) and Bimbo.
Barnacle Bill is a 40 centimeter rock on Mars in Ares Vallis. It was the first rock on Mars analyzed by the Sojourner rover using its Alpha Proton X-ray Spectrometer. The encounter occurred during Sol 3 of the Mars Pathfinder mission on the surface of Mars and took ten hours to complete.