The diamond lizardfish (Synodus synodus) is a species of lizardfish that lives in tropical and subtropical waters of the Atlantic Ocean.
The diamond lizardfish ranges from North Carolina (U.S.) to Uruguay in the Americas, and is also distributed through numerous Atlantic Islands in the Caribbean, Bermuda, Saint Helena and Ascension Island, São Tomé, Senegal, and the Macaronesia (Cape Verde, Canary Islands, Savage Islands and Madeira).