Nesiarchus nasutus

Nesiarchus nasutus
Conservation status
Not evaluated (IUCN 3.1)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Perciformes
Family:	Gempylidae
Genus:	Nesiarchus J. Y. Johnson, 1862
Species:	N. nasutus
Binomial name
Nesiarchus nasutus J. Y. Johnson, 1862
Synonyms
Prometheus paradoxus Capello, 1867 Thyrsitops violaceus T. H. Bean, 1887 Bipinnula violacea (T. H. Bean, 1887) Escolar violaceus (T. H. Bean, 1887)

Nesiarchus nasutus, the Black gemfish, is a species of snake mackerel found in tropical and subtropical waters in most parts of the world, though not in east Pacific and north Indian waters. It occurs at depths of from 200 to 1,200 metres (660 to 3,940 ft) though they make diel vertical migrations from benthopelagic to mesopelagic depths at night. This species can reach a length of 130 centimetres (51 in) SL though most do not exceed 80 centimetres (31 in) SL. It is of minor importance to local commercial fisheries. This species is currently the only known member of its genus, Nesiarchus.^[1] That genus is thus considered monotypic.

References

Mackerel
True mackerels (tribe Scombrini)	Scomber (4 species) Atlantic mackerel Atlantic chub mackerel Blue mackerel Chub mackerel Rastrelliger (3 species) Short mackerel Indian mackerel Island mackerel
Spanish mackerels (tribe Scomberomorini)	Acanthocybium (1 species) Wahoo Grammatorcynus (2 species) Double-lined mackerel Shark mackerel Scomberomorus (18 species) Atlantic Spanish mackerel Australian spotted mackerel Broadbarred king mackerel Cero mackerel Chinese mackerel Indo-Pacific king mackerel Japanese Spanish mackerel King mackerel Korean mackerel Monterrey Spanish mackerel Narrow-barred Spanish mackerel Pacific sierra Papuan Spanish mackerel Queen mackerel Queensland school mackerel Serra Spanish mackerel Streaked Spanish mackerel West African Spanish mackerel
Non-Scombrid mackerels	Jack mackerels (15 species) Atlantic horse mackerel Blue jack mackerel Cape horse mackerel Chilean jack mackerel Cunene horse mackerel Greenback horse mackerel Japanese horse mackerel Mediterranean horse mackerel Pacific jack mackerel Yellowtail horse mackerel African scad Arabian scad Crozet scad Rough scad Trachurus aleevi Snake mackerels (5 species) Black snake mackerel Blacksail snake mackerel Snake mackerel Violet snake mackerel White snake mackerel Hexagrammidae (2 species) Okhotsk atka mackerel Atka mackerel
Family Scombridae Subfamily Scombrinae Other Scombrids: Butterfly kingfish (butterfly mackerel) Tunas (tribe Thunnini) Bonitos (tribe Sardini)