A bluefish is a type of fish (Pomatomus saltatrix). It may also refer to:

• New Zealand bluefish (Girella cyanea), another species of fish
• Sablefish (Anoplopoma fimbria), a species of fish commonly known as bluefish in the UK

• Bluefish Caves, archaeological site in Yukon, Canada

• Bluefish Communications, consulting company acquired by Vodafone Global Enterprise
• Bluefish (company), executive concierge service
• Bridgeport Bluefish, a defunct baseball team in Connecticut, United States

Two ships of the United States Navy have borne the name Bluefish, after the bluefish (Pomatomus saltatrix):

• The USS Bluefish (SS-222), was a Gato-class submarine, commissioned in 1943 and struck in 1959.
• The USS Bluefish (SSN-675), was a Sturgeon-class submarine, commissioned in 1971 and struck in 1996.

• Bluefish (software), an advanced text editor.