Spearfish may refer to:

Places[edit]

• Spearfish, South Dakota, United States
• North Spearfish, South Dakota, United States
• Spearfish Formation, a geologic formation in the United States

Biology[edit]

• Tetrapturus, a genus of marlin with shorter rostrum (a.k.a. snout or bill) and stunted sail behind the dorsal fin
  • Longbill spearfish, native to the Atlantic Ocean
  • Mediterranean spearfish, native to the Mediterranean Sea
  • Shortbill spearfish, native to the Indo-Pacific
  • Roundscale spearfish, native to the Eastern Atlantic to the western Mediterranean
• Spearfish remora, a species of remora found around the world in tropical and subtropical seas
• Spearfish Fisheries Center, one of 70 fish hatcheries as part of the National Fish Hatchery System of the U.S. Fish and Wildlife Service

Military[edit]

• Spearfish torpedo, or simply Spearfish, is a modern torpedo built by GEC-Marconi
• Fairey Spearfish, a prototype dive bomber of the immediate post World War II period
• HMS Spearfish (69S), a 1936 British S-class submarine lost in World War II
• USS Spearfish (SS-190), a US submarine in World War II