The fictional submarine in the television series Voyage to the Bottom of the Sea was Seaview.
Seaview is the futuristic nuclear-powered submarine commanded by Admiral Harriman Nelson in the science-fiction television series. The show was created by Irwin Allen and ran on ABC from 1964 to 1968, following the 1961 film of the same name.
In the series, Seaview serves as both a naval vessel and a platform for investigating unusual scientific and extraterrestrial threats. Its crew operates from the fictional Nelson Institute of Marine Research, and the submarine’s observation nose section is one of its most recognizable features.
Seaview is sometimes confused with real submarines or with other fictional vessels such as Captain Nemo’s Nautilus and the Red October. Unlike those vessels, Seaview was created specifically for Allen’s film and television universe and is not the name of an actual commissioned submarine.