Lizardfish, any of about 57 species of marine fish of the family Synodontidae, found primarily in the tropics. Lizardfish are elongated with rounded bodies and scaly heads. They grow to a maximum length of about 50 centimetres (20 inches) and are characteristically mottled or blotched to blend with their surroundings. The lizardfish are known as 'benthic' creatures. Benthic is just a fancy word for entities that live in the sandy, shallow bottom water of the ocean. The true lizardfish or those of the Synodus origin live under the coastal waters throughout the world.