Aqualung can refer to:
*Aqua-lung (often spelled "aqualung" in the United Kingdom) is a type of SCUBA diving equipment, and sometimes used generically to refer to SCUBA breathing apparatus. See also scuba set.
*''Aqualung'', an album by Jethro Tull, as well as a hit song, ''Aqualung'', from that album.
*Aqualung, the stage name of Matt Hales, a British musician.
*''Aqualung'', an album by the aforementioned artist.
*Aqualung, a concert venue in the Spanish city of Madrid.
*For a dinosaur, see its correct spelling ''Dryptosaurus aquilunguis''.