Beloniformes is an order composed of six families of freshwater and marine ray-finned fish: Adrianichthyidae Belonidae Exocoetidae Hemiramphidae Scomberesocidae Zenarchopteridae With the exception of the Adrianichthyidae, these are streamlined, medium-sized fishes that live close to the surface of the water, feeding on algae, plankton, or smaller animals including other fishes. Wikipedia