| Family | Scientific Name | Author | Year | Common Name |
| Stomiidae | Borostomias antarcticus | (Lonnberg) | 1905 | Straightline Snaggletooth |
Family Astronesthidae (genera Astronesthes and Borostomias) – Chin barbel present. Dorsal fin usually near middle of body, its origin about over pelvic fins; dorsal adipose fin present. Anterior portion of lower photophore row curving upward at pelvic-fin base and appearing disjunct from posterior portion of row; postorbital photophore prominent, located posteroventrally to eye. Patches of luminous tissue on body in many species (FAO 2002).
Borostomias antarcticus
Unique Characteristics: Body without scales or hexagonal scale pockets. Dorsal fin distinctly anterior to anal fin; dorsal adipose fin present. Anal-fin rays 20 or fewer; snout not upturned; gill rakers as 1-4 short teeth set in groups far apart. PV and VAV in a regular, continuous row; total PV photophores 26 or less; OA photophores usually 44 or fewer; AC series straight. Teeth on maxillary slender, distinctly separated, not slanting rearward. Premaxillary teeth and anterior lower jaw teeth as large fangs. Anterior part of upper and lower jaws with fangs much longer than other teeth. Dorsal-fin origin only slightly behind pelvic-fin origin (FAO 2020).
Similar Species: None
References:
FAO. 2002. The living marine resources of the Western Central Atlantic. Volumes 1-3. K.E. Carpenter (ed.). Food and Agriculture Organization of the United Nations, Rome, Italy. 4099 pp. http://www.fao.org/3/y4160e/y4160e00.htm.
(FAO 2020) Sutton, T.T., P.A. Hulley, R. Wienerroither, D. Zaera-Perez, and J.R. Paxton. 2020. Identification guide to the mesopelagic fishes of the central and south east Atlantic Ocean. FAO Species Identification Guide for Fishery Purposes. Rome, FAO. 327 pp. https://doi.org/10.4060/cb0365en.