Two ships of the United States Navy have borne the name USS Sunfish, named in honor of the ocean sunfish, Mola mola, a plectognath marine fish, having a deep body truncated behind, and high dorsal and anal fins.
, was a , commissioned in 1942 and struck in 1960. She made eleven war patrols in the Pacific during World War II. , was a , commissioned in 1969 and struck in 1997.