Blowfish are species of fish in the family Tetraodontidae.

Blowfish may also refer to:

Porcupinefish, belonging to the family Diodontidae Blowfish (cipher), an encryption algorithm Blowfish (company), an American erotic goods supplier The Blowfish, a satirical newspaper at Brandeis University Lexington County Blowfish, a baseball team Vice President Blowfish, a character in the animated series Adventure Time episode "President Porpoise Is Missing!"

See also Hootie & the Blowfish, an American rock band