[Fr., from L. grunnire, to grunt.] A kind of marine fish, supposed to make a grunting noise when taken out of water by the vibration of the muscles of its air-bladder. It has a large and spiny head, with mail ed cheeks and large eyes. Some gurnards are highly esteemed for food. The flying gurnard is found in the Atlantic, and is able to fly like the flying-fish. It has large pectoral fins filled with nerves, by the aid of which smaller animals are detected. Thus they serve as food-providers.