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surface. The eyes are a fluorescent green while the shark is alive. The body of this shark is small, slim, and fusiform in shape. As the name suggests, this shark has six gill slits, unusual among most shark species. The head is narrow and somewhat flattened, and the mouth contains 5 rows of large,
378:
Little is known about the feeding habits of the bigeyed sixgill. Based on the few stomach examinations of these sharks, they are thought to feed mainly on small to moderately sized bony fish and bottom dwelling crustaceans. Like all sharks of the order
Hexanchiformes found so far, this shark is
311:). These sharks live near the sea floor between 90 and 600 m deep, but may move closer to the surface at night to take advantage of prey there. They make their home on continental shelves, insular shelves, and upper slopes. These sharks do not inhabit abyssal environments.
515:
283:, and is behind the pelvic fins. The upper caudal fin is much longer than the lower, with a deep notch near the tip. All fins have thin white margins on the edge. In juveniles, the upper caudal fin has a black tip.
595:, L. & Maillard, C. (1974) Les Monogènes Hexabothriidae Price, 1942. Historique, systématique, phylogenèse. Bulletin du Muséum National d'Histoire Naturelle, 3° série, 206, Zoologie 136, 113-141.
395:. Based on what little is known of the species, these sharks are not suffering major declines to their population, but pressure is growing from deepwater fisheries. According to the
383:, meaning the eggs are retained inside the female's body until hatching. The bigeyed sixgill, after an unknown gestation period, gives birth to litters of up to 13 pups.
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Length at birth for this species is 34–45 cm; adults average 1.2 m for both genders, with a maximum of 1.8 m. Mature adults weigh around 20 kg.
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Finucci, B., Barnett, A., Cheok, J., Cotton, C.F., Kulka, D.W., Neat, F.C., Rigby, C.L., Tanaka, S. & Walker, T.I. 2020.
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Bigeyed sixgills are found in the Indian Ocean and the western
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surface has a brownish-gray color, and is sharply separated from the light coloring of its
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formerly grouped within this species are now considered their own species, the
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comb-shaped teeth. This shark's single dorsal fin is pushed back towards the
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n. sp. (Monogenea, Hexabothriidae) from the bigeye sixgill shark
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As with other sharks, bigeyed sixgill sharks harbour a number of
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FAO Species
Catalogue Volume 4 Parts 1 and 2 Sharks of the World
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Compagno, Leonardo, Dando, Marc and Fowler, Sarah (2005).
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The bigeyed sixgill is listed as near threatened by the
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Teng (Elasmobranchii, Hexanchidae) off New
Caledonia".
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669:. Princeton University Press. pp. 67–68.
561:. The IUCN Red List of Threatened Species
362:was recently described from the gills of
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1208:IUCN Red List near threatened species
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797:Southern African frilled shark (
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397:International Shark Attack File
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900:Broadnose sevengill shark (
843:Sharpnose sevengill shark (
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607:Protocotyle euzetmaillardi
356:Protocotyle euzetmaillardi
325:Protocotyle euzetmaillardi
867:Bluntnose sixgill shark (
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81:Scientific classification
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605:Justine, J.-L. (2011). "
571:Bigeyed Sixgill Sharks,
876:Bigeyed sixgill shark (
615:Systematic Parasitology
370:, South Pacific Ocean.
1218:Fish described in 1962
579:18 August 2013 at the
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305:Atlantic sixgill shark
35:Bigeyed sixgill shark
725:frilled and cow shark
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251:bigeyed sixgill shark
977:Hexanchus_nakamurai
963:Hexanchus nakamurai
933:Hexanchus nakamurai
667:Sharks of the World
649:Hexanchus nakamurai
611:Hexanchus nakamurai
573:Hexanchus nakamurai
559:Hexanchus nakamurai
474:, six gill openings
364:Hexanchus nakamurai
256:Hexanchus nakamurai
237:Hexanchus nakamurai
210:Hexanchus nakamurai
51:Conservation status
18:Hexanchus nakamurai
778:Chlamydoselachidae
501:Front part of body
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295:Range and habitat
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241:Hexanchus vitulus
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891:Notorynchus
824:Hexanchidae
799:C. africana
534:Hexanchidae
444:Lower teeth
432:Upper teeth
342:Protocotyle
337:Monogeneans
268:Hexanchidae
239:(blue) and
168:Hexanchidae
1202:Categories
869:H. griseus
750:Vertebrata
748:Subphylum
651:Teng, 1962
545:References
281:caudal fin
134:Subclass:
1213:Hexanchus
858:Hexanchus
760:Subclass
351:Hexanchus
335:species.
315:Parasites
261:cow shark
186:Species:
179:Hexanchus
104:Kingdom:
98:Eukaryota
1120:2.788590
1081:11126745
1037:FishBase
1016:46560149
948:Q1548052
942:Wikidata
845:H. perlo
768:Selachii
744:Chordata
738:Animalia
736:Kingdom
655:Fishbase
635:21161490
577:Archived
507:See also
374:Behavior
345:(family
333:parasite
164:Family:
118:Chordata
114:Phylum:
108:Animalia
94:Domain:
71:IUCN 3.1
1055:2420579
742:Phylum
727:species
723:Extant
276:ventral
263:of the
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220:, 1962)
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154:Order:
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272:dorsal
270:. Its
265:family
243:(red)
1180:WoRMS
1076:IRMNG
1024:EUNIS
1003:3LGK9
990:85720
593:Euzet
489:, eye
1154:OBIS
1128:NCBI
1102:IUCN
1089:ITIS
1050:GBIF
985:BOLD
671:ISBN
631:PMID
420:Jaws
366:off
249:The
218:Teng
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