A genus with a single species found in most of the world oceans.
Echiostoma has the following characteristics: snout slightly longer than eye diameter; jaws nearly as long as head, straight, lower jaw slightly shorter than upper; large, barbed, fang-like teeth in jaws, some rigid among smaller teeth; small teeth on vomer, palatines and basibranchials; chin barbel generally shorter than head, terminating in bulbs and various filaments, varying with age and between sexes; vertical rows of smaller photophores as well as serial photophores and 2 longitudinal bands of luminous tissue, one along back and one below lateral series; postorbital light organ behind eye above dorsal margin of upper jaw, an elongated triangle, size varying with age and between sexes; dorsal and anal fins about equal in size; dorsal adipose fin absent; pectoral fins close behind head, 1st ray unattached to others, elongate; ventral fins based near ventral profile of body, narrow, short, nearer tail than snout.
Kenaley, C.P., Harold, A.S. & Gomon, M.F. 2008. Family Stomiidae. pp. 240-254 in Gomon. M.F., Bray, D.J. & Kuiter, R.H (eds). Fishes of Australia's Southern Coast. Sydney : Reed New Holland 928 pp. 
Lowe, R.T. 1843. Notices of fishes newly observed or discovered in Madeira during the years 1840, 1841 and 1842. Proceedings of the Zoological Society of London 11: 81-95 .
Robertson, E.M. & Gomon, M.F. 1994. Families Stomiidae, Chauliodontidae, Astronesthidae, Melanostomiidae, Malacosteidae, Idiacanthidae. pp. 251-263 figs 225-235 in Gomon, M.F., Glover, C.J.M. & Kuiter, R.H (eds). The Fishes of Australia's South Coast. Adelaide : State Printer 992 pp. 810 figs