Dermogenys is a genus of viviparous halfbeaks. Zenarchopterus is a genus of viviparous halfbeaks. They live in murky, acidic water amongst submerged vegetation alongside rasboras, pipefish, halfbeaks, and gobies. The similar viviparous halfbeaks (family Zenarchopteridae) have often been included in this family. Examples of marine bait fish are anchovies, gudgeon, halfbeaks such as ballyhoo, and scad. The phylogeny of the halfbeaks is in a state of flux. Zenarchopteridae, the viviparous halfbeaks, is a family in the order Beloniformes. Hemiramphidae is a family of fishes that are commonly called halfbeaks, spipe fish or spipefish. Marine halfbeaks are typically pelagic schooling forage fish. Perches, halfbeaks, Carangidae, needlefish and rays are also caught near the reefs. Halfbeaks inhabit warm seas, predominantly at the surface, in the Atlantic, Indian, and Pacific oceans. Halfbeaks sometimes eat flake foods as well. Most are marine, though a few needlefish and halfbeaks inhabit brackish and fresh waters. The halfbeaks are elongate, streamlined fish adapted to living in open water. Halfbeaks carry several adaptations to feeding at the water surface.