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Alepisaurus ferox Lowe, 1833
Lancet Fish; Alepisaurus richardsonii Bleeker, 1855

Life   Vertebrata   Fish   Alepisauridae   Alepisaurus

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Kingdom Animalia  
 Phylum Chordata  
 Class Actinopterygii  
 Order Aulopiformes  
 Family Alepisauridae  
 Genus Alepisaurus  
  Alepisaurus ferox    Lowe, 1833 
Provider: Kwang-Tsao Shao 
hierarchy tree    download xml    download txt    Chinese Page    
Synonyms: Alepidosaurus aesculapius Alepidosaurus borealis Alepidosaurus poeyi Alepidosaurus serra Alepisaurus altivelis Alepisaurus azureus Alepisaurus borealis Alepisaurus richardsonii Plagyodus aesculapius Plagyodus borealis   details
Citation: 臺灣魚類誌(沈等, 1993)
Character: Body slender, moderately compressed, very elongate. Head small. Eye moderate, round, lateral. Snout large, longer than eye diameter. Mouth very large, jaws extending beyond eye; supramaxilla absent ; lower jaw without fleshy tip. Jaw teeth mostly small, in 1 row, both fixed and depressible teeth present, lower jaw with at least 1 fang; palatine with moderate teeth and 2 fangs in 1 row; vomer and tongue toothless. Dorsal fin extraordinarily high and long, sail-like, extending from head to over anal fin, with 32 to 41 rays; anal fin posterior, with 13 to 18 rays. Lateral dermal keel present, long, from about middle of body to end of caudal peduncle. Scales absent; lateral line present, consisting of small pores. Generally pale, iridescent, darker dorsally; lateral adipose keel dark; all fins dark brown or black; peritoneum black. 
Habitat: Epipelagic- and mesopelagic, from near the surface to below 1,000 m, sometimes approaching inshore waters. Mainly nocturnal. Feed on fishes, cephalopods, tunicates, and crustaceans. Preyed upon by opah, sharks, albacore, yellowfin tuna, and fur seals. Ovi 
Distribution: Widely found in warm waters of North Pacific, Indian, and Atlantic Oceans. It found in northeastern Taiwanese waters. 
Utility: Marketed fresh. Litter commercial importance.  
Name Code: 380828
  IUCN Red List:LC       Marine     
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Common name (e.g. trout)

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Alepisaurus ferox Lowe , 1833

Long snouted lancetfish Add your observation in Fish Watcher
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This map was computer-generated and has not yet been reviewed.
Alepisaurus ferox   AquaMaps   Data sources: GBIF OBIS
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Pictures | Google image Image of Alepisaurus ferox (Long snouted lancetfish) Alepisaurus ferox
Picture by Chow, S.

Classification / Names Common names | Synonyms | Catalog of Fishes ( gen. , sp. ) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Aulopiformes (Grinners) > Alepisauridae (Lancetfishes)
Etymology: Alepisaurus: Greek, alepis, -idos = without scales + Greek, sauros = lizard (Ref. 45335 ) ;   ferox: The specific name is derived from ferox , meaning ferocious (Ref. 6885 ) .  More on author: Lowe .

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; bathypelagic; oceanodromous (Ref. 51887 ); depth range 0 - 1830 m (Ref. 50550 ).   Deep-water; 84°N - 57°S, 180°W - 180°E

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Circumglobal: Western Pacific (Ref. 6885 , 7300 ); Eastern Pacific: from the Aleutian Islands to Chile, also (Ref. 2850 ); Western Atlantic: Gulf of Maine to the Gulf of Mexico and the Caribbean Sea, also (Ref. 7251 ); Eastern Atlantic (Ref. 4059 ). Indian Ocean (Ref. 57630 ). Northwest Atlantic: Canada (Ref. 5951 ). South China Sea and East China Sea (Ref. 74511 ).

Size / Weight / Age

Maturity: L m   ?   range ? - ? cm
Max length : 215 cm TL male/unsexed; (Ref. 7251 ); common length : 150 cm TL male/unsexed; (Ref. 5217 ); max. published weight: 9.0 kg (Ref. 42154 )

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 30-45; Anal spines : 0; Anal soft rays : 13 - 18; Vertebrae : 47 - 52. Mouth large with two erect fangs on palatines. Dorsal fin very high, about three rays beginning with third or fourth much exerted; adipose moderate in size, over posterior part of anal insertion (Ref. 6885 ). Generally pale, iridescent, darker dorsally; lateral adipose keel dark; all fins dark brown or black; peritoneum black (Ref. 6885 ). Branchiostegal rays: 7-8 (Ref. 36025 ).

Biology     Glossary (e.g. epibenthic)

Mainly inhabit tropical and subtropical waters; however, during the feeding period adults may migrate to the subarctic reaching as far north as Greenland, Iceland and the Bering Sea (Ref. 51887 ). Epipelagic- and mesopelagic, from near the surface to below 1,000 m, sometimes approaching inshore waters (Ref. 6011 ). Bathypelagic (Ref. 58302 ). Mainly nocturnal. Feeds on fishes, cephalopods, tunicates, and crustaceans (Ref. 6011 ). Preyed upon by opah, sharks, albacore, yellowfin tuna, and fur seals (Ref. 6885 ). Oviparous, with planktonic larvae (Ref. 36025 ). Are synchronous hermaphrodites (Ref. 84733 ). Occasionally consumed but of little importance due to its soft flesh (Ref. 5217 ). The maximum weight given is for a 167 cm FL specimen (Ref. 42154 ).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Oviparous. Gonads of adolescents are hermaphroditic, but there is no proof that the species is a functional hermaphrodite (Ref. 6011 ). However, further studies show that this species is a synchronous hermaphrodite where gonads consist of clearly defined and well separated ovarian and testicular regions with no indication of sequential maturation of the sex products (Ref. 84733 ).

Main reference Upload your references | References | Coordinator : Thompson, Bruce | Collaborators

Post, A. , 1984. Alepisauridae. p. 494-495. In P.J.P. Whitehead, M.-L. Bauchot, J.-C. Hureau, J. Nielsen and E. Tortonese (eds.) Fishes of the north-eastern Atlantic and the Mediterranean. UNESCO, Paris. Vol. 1. (Ref. 6011 )

IUCN Red List Status (Ref. 120744 )

  Least Concern (LC)  ; Date assessed: 04 February 2009

CITES (Ref. 118484 )

Not Evaluated

CMS (Ref. 116361 )

Not Evaluated

Threat to humans


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Estimates based on models

Preferred temperature (Ref. 115969 ): 4.7 - 14.6, mean 8.9 (based on 1772 cells). Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 1.0000   [Uniqueness, from 0.5 = low to 2.0 = high]. Trophic Level (Ref. 69278 ):  4.0   ±0.2 se; Based on diet studies. Resilience (Ref. 120179 ):  Very Low, minimum population doubling time more than 14 years (). Vulnerability (Ref. 59153 ):  Very high vulnerability (83 of 100) .

Entered by Froese, Rainer Modified by Luna, Susan M. Fish Forum
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