View data on Catalog of Fishes here.
Dorsal-fin rays 14–15; anal-fin rays 16; pectoral-fin rays 13–14; gill rakers 18–21; vertebrae (rarely 33).
Largest specimen less than 50 mm SL. body narrow, tapering into narrow caudal peduncle; its greatest depth less than length of subcaudal photophore group; eye relatively small, orbital diameter greater than six times into SL; post-temporal spine long, about one-half the diameter of orbit (or greater); dorsal spine short; preopercle spine short, narrowly triangulate; abdominal keel scales smooth, not extending far beyond body margins; subcaudal photophores spaced apart (about width of a photophore between them), distance between subcaudal and anal photophores about the same as length of one of the former; supra-anal raised only slightly above anals, with first supra-anal higher than second; supra-abdominal photophores in an oblique straight line; jaws medium; teeth minute; definite vomerine teeth present; gill rakers long, spinose; in preservative, pigment dark dorsally with broad, dark bar reaching to or near midline; dark pigment spots along trunk midline with pigment striations radiating from them; dark pigment above ventral photophores.
Post-temporal spine simple, bearing no basal spines; lateral edge of post-temporal-supracleithrum smooth; keel scales with smooth ventral surfaces; supraanal photophores separate, usually raised well above anal group. Post-temporal spine long, its length greater than one-fourth the diameter of orbit; anal photophore number 10 to 13 (adults only); body long and narrow, greater than 1.7 times body depth; first supra-anal photophore even with or raised above the second. Gill rakers 18 to 21; supra-anal photophores distinctly raised above the anal group; preopercle spine short, somewhat triangulate. Subcaudal photophores somewhat spread; length of subcaudal group equal or greater than narrowest peduncle depth; distance from top of last supra-anal photophore to top of first anal less than one-half preanal length.
Extremely disjunct range; from a specimen north of Madagascar in the Indian Ocean and from a single capture in the Central Pacific north of the Marquesas Islands.
Baird RC. 1971. The Systematics, Distribution, and Zoogeography of the Marine Hatchetfishes (family Sternoptychidae). Bulletin of the Museum of Comparative Zooology 142(1):1–128.
Baird RC. 1971. The Systematics, Distribution, and Zoogeography of the Marine Hatchetfishes (family Sternoptychidae). Bulletin of the Museum of Comparative Zooology 142(1):1–128.
Less than 55 mm SL.
Eastern Indian Ocean, 11°26.8'S, 48°58.2'E, Discovery station 5509, depth 200 meters.
Holotype: BMNH 1970.7.30.1.
Polyipnus omphus is a species of ray-finned fish in the genus Polyipnus. It is found in the Western and Central Pacific and lives below 200 m.[1]
Polyipnus omphus is a species of ray-finned fish in the genus Polyipnus. It is found in the Western and Central Pacific and lives below 200 m.
