Spearfish

Spearfish may refer to:

In geography:

• Spearfish, South Dakota, United States
• North Spearfish, South Dakota, United States

In biology:

• Marlin, or Spearfish, a fish with an elongated body, a spear-like snout or bill

In 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, a British S-class submarine lost in World War II
• USS Spearfish, a US submarine in World War II