lizardfish \lizardfish\, lizard fish \lizard fish\n. (Zool.) Any of several mostly tropical marine scopeloid fish of the family {Synodontidae} having large mouths in lizardlike heads, especially the {inshore lizardfish} ({Synodus foetens} syn. {Synodus poeyi}) of Mideastern and Southern United States and West Indies; -- sometimes called {sand pike}. Note: A freshwater perch, the sauger, a different fish, is also called the sand pike. Syn: snakefish. [WordNet 1.5]