Spearfish may refer to:
Places Spearfish, South Dakota, United States North Spearfish, South Dakota, United States Spearfish Formation, a geologic formation in the United States
Biology Tetrapturus, a genus of marlin 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, or D.C. Booth Historic National Fish Hatchery, operated by the U.S. Fish and Wildlife Service
Military 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