440:
455:
485:
470:
217:
395:
428:
416:
31:
309:
75:
404:
50:
267:
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,
367:
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
300:). 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.
504:
272:, 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.
584:, 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.
384:. 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
372:, 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.
1064:
1196:
1116:
280:
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.
1038:
703:
1077:
454:
439:
388:, the bigeyed sixgill is harmless, as its natural environment is far from people, and no attacks on humans by the species have been reported.
1142:
1012:
663:
1168:
1206:
484:
385:
785:
546:
Finucci, B., Barnett, A., Cheok, J., Cotton, C.F., Kulka, D.W., Neat, F.C., Rigby, C.L., Tanaka, S. & Walker, T.I. 2020.
469:
1082:
696:
427:
415:
973:
960:
565:
1121:
344:
313:
74:
888:
879:
831:
822:
951:
855:
689:
913:
293:
288:
Bigeyed sixgills are found in the Indian Ocean and the western
Pacific Ocean. Populations in the western
978:
216:
189:
403:
394:
30:
1173:
999:
308:
39:
1108:
1201:
766:
69:
1069:
1155:
986:
659:
619:
1160:
1095:
776:
611:
260:
253:
965:
636:
263:
surface has a brownish-gray color, and is sharply separated from the light coloring of its
1129:
569:
54:
750:
744:
713:
681:
527:
517:
335:
289:
146:
126:
116:
1190:
1090:
794:
509:
381:
369:
356:
59:
991:
503:
1103:
1051:
945:
581:
522:
330:
206:
936:
292:
formerly grouped within this species are now considered their own species, the
738:
615:
499:
269:
1017:
268:
comb-shaped teeth. This shark's single dorsal fin is pushed back towards the
846:
812:
325:
256:
249:
166:
156:
86:
623:
559:
1134:
1025:
930:
732:
643:
321:
106:
1043:
264:
1056:
1030:
726:
96:
907:
756:
307:
136:
1004:
598:
n. sp. (Monogenea, Hexabothriidae) from the bigeye sixgill shark
320:
As with other sharks, bigeyed sixgill sharks harbour a number of
1147:
678:
FAO Species
Catalogue Volume 4 Parts 1 and 2 Sharks of the World
911:
685:
654:
Compagno, Leonardo, Dando, Marc and Fowler, Sarah (2005).
380:
The bigeyed sixgill is listed as near threatened by the
602:
Teng (Elasmobranchii, Hexanchidae) off New
Caledonia".
920:
877:
844:
820:
811:
774:
765:
338:) have been found only on the gills of species of
697:
8:
908:
817:
771:
704:
690:
682:
215:
48:
29:
20:
658:. Princeton University Press. pp. 67–68.
550:. The IUCN Red List of Threatened Species
351:was recently described from the gills of
539:
390:
1197:IUCN Red List near threatened species
7:
14:
786:Southern African frilled shark (
502:
483:
468:
453:
438:
426:
414:
402:
393:
73:
386:International Shark Attack File
1:
889:Broadnose sevengill shark (
832:Sharpnose sevengill shark (
1223:
596:Protocotyle euzetmaillardi
345:Protocotyle euzetmaillardi
314:Protocotyle euzetmaillardi
856:Bluntnose sixgill shark (
721:
616:10.1007/s11230-010-9275-6
223:
214:
195:
188:
70:Scientific classification
68:
46:
37:
28:
23:
594:Justine, J.-L. (2011). "
560:Bigeyed Sixgill Sharks,
865:Bigeyed sixgill shark (
604:Systematic Parasitology
359:, South Pacific Ocean.
1207:Fish described in 1962
568:18 August 2013 at the
317:
294:Atlantic sixgill shark
24:Bigeyed sixgill shark
714:frilled and cow shark
311:
240:bigeyed sixgill shark
966:Hexanchus_nakamurai
952:Hexanchus nakamurai
922:Hexanchus nakamurai
656:Sharks of the World
638:Hexanchus nakamurai
600:Hexanchus nakamurai
562:Hexanchus nakamurai
548:Hexanchus nakamurai
463:, six gill openings
353:Hexanchus nakamurai
245:Hexanchus nakamurai
226:Hexanchus nakamurai
199:Hexanchus nakamurai
40:Conservation status
767:Chlamydoselachidae
490:Front part of body
318:
1184:
1183:
1156:Open Tree of Life
914:Taxon identifiers
905:
904:
901:
900:
807:
806:
350:
298:Hexanchus vitulus
284:Range and habitat
236:
235:
230:Hexanchus vitulus
181:H. nakamurai
63:
1214:
1177:
1176:
1164:
1163:
1151:
1150:
1138:
1137:
1125:
1124:
1112:
1111:
1099:
1098:
1086:
1085:
1073:
1072:
1060:
1059:
1047:
1046:
1034:
1033:
1021:
1020:
1008:
1007:
995:
994:
982:
981:
969:
968:
956:
955:
954:
941:
940:
939:
909:
818:
777:Chlamydoselachus
772:
706:
699:
692:
683:
666:
652:
646:
634:
628:
627:
591:
585:
579:
573:
557:
551:
544:
512:
507:
506:
487:
472:
457:
442:
430:
418:
406:
397:
348:
224:Distribution of
219:
201:
78:
77:
57:
52:
51:
33:
21:
16:Species of shark
1222:
1221:
1217:
1216:
1215:
1213:
1212:
1211:
1187:
1186:
1185:
1180:
1172:
1167:
1159:
1154:
1146:
1141:
1133:
1130:Observation.org
1128:
1120:
1115:
1107:
1102:
1094:
1089:
1081:
1076:
1068:
1063:
1055:
1050:
1042:
1037:
1029:
1024:
1016:
1011:
1003:
998:
990:
985:
977:
972:
964:
959:
950:
949:
944:
935:
934:
929:
916:
906:
897:
873:
840:
803:
795:Frilled shark (
761:
717:
710:
675:
670:
669:
653:
649:
635:
631:
593:
592:
588:
580:
576:
572:. marinebio.org
570:Wayback Machine
558:
554:
545:
541:
536:
508:
501:
498:
491:
488:
479:
473:
464:
458:
449:
443:
434:
431:
422:
419:
410:
407:
398:
378:
365:
306:
286:
278:
210:
203:
197:
184:
72:
64:
55:Near Threatened
53:
49:
42:
17:
12:
11:
5:
1220:
1218:
1210:
1209:
1204:
1199:
1189:
1188:
1182:
1181:
1179:
1178:
1165:
1152:
1139:
1126:
1113:
1100:
1087:
1074:
1061:
1048:
1035:
1022:
1009:
996:
983:
970:
957:
942:
926:
924:
918:
917:
912:
903:
902:
899:
898:
896:
895:
885:
883:
875:
874:
872:
871:
862:
852:
850:
842:
841:
839:
838:
828:
826:
815:
809:
808:
805:
804:
802:
801:
792:
782:
780:
769:
763:
762:
760:
759:
753:
751:Elasmobranchii
747:
745:Chondrichthyes
741:
735:
729:
722:
719:
718:
711:
709:
708:
701:
694:
686:
680:
679:
674:
673:External links
671:
668:
667:
647:
629:
586:
574:
552:
538:
537:
535:
532:
531:
530:
528:Hexanchiformes
525:
520:
518:List of sharks
514:
513:
497:
494:
493:
492:
489:
482:
480:
474:
467:
465:
459:
452:
450:
444:
437:
435:
432:
425:
423:
420:
413:
411:
408:
401:
399:
392:
377:
374:
364:
361:
342:. The species
336:Hexabothriidae
305:
302:
290:Atlantic Ocean
285:
282:
277:
274:
234:
233:
221:
220:
212:
211:
204:
193:
192:
186:
185:
178:
176:
172:
171:
164:
160:
159:
154:
150:
149:
147:Hexanchiformes
144:
140:
139:
134:
130:
129:
127:Elasmobranchii
124:
120:
119:
117:Chondrichthyes
114:
110:
109:
104:
100:
99:
94:
90:
89:
84:
80:
79:
66:
65:
47:
44:
43:
38:
35:
34:
26:
25:
15:
13:
10:
9:
6:
4:
3:
2:
1219:
1208:
1205:
1203:
1200:
1198:
1195:
1194:
1192:
1175:
1170:
1166:
1162:
1157:
1153:
1149:
1144:
1140:
1136:
1131:
1127:
1123:
1118:
1114:
1110:
1105:
1101:
1097:
1092:
1088:
1084:
1079:
1075:
1071:
1066:
1062:
1058:
1053:
1049:
1045:
1040:
1036:
1032:
1027:
1023:
1019:
1014:
1010:
1006:
1001:
997:
993:
988:
984:
980:
975:
971:
967:
962:
958:
953:
947:
943:
938:
932:
928:
927:
925:
923:
919:
915:
910:
894:
892:
891:N. cepedianus
887:
886:
884:
882:
881:
876:
870:
868:
863:
861:
859:
854:
853:
851:
849:
848:
843:
837:
835:
830:
829:
827:
825:
824:
819:
816:
814:
810:
800:
798:
793:
791:
789:
784:
783:
781:
779:
778:
773:
770:
768:
764:
758:
754:
752:
748:
746:
742:
740:
736:
734:
730:
728:
724:
723:
720:
715:
707:
702:
700:
695:
693:
688:
687:
684:
677:
676:
672:
665:
664:9780691120720
661:
657:
651:
648:
645:
641:
639:
633:
630:
625:
621:
617:
613:
609:
605:
601:
597:
590:
587:
583:
578:
575:
571:
567:
564:
563:
556:
553:
549:
543:
540:
533:
529:
526:
524:
521:
519:
516:
515:
511:
510:Sharks portal
505:
500:
495:
486:
481:
477:
471:
466:
462:
456:
451:
448:, upper teeth
447:
441:
436:
429:
424:
417:
412:
405:
400:
396:
391:
389:
387:
383:
382:IUCN Red List
375:
373:
371:
370:ovoviviparous
362:
360:
358:
357:New Caledonia
354:
349:Justine, 2011
347:
346:
341:
337:
333:
332:
328:of the genus
327:
323:
316:
315:
310:
303:
301:
299:
295:
291:
283:
281:
275:
273:
271:
266:
262:
258:
255:
251:
247:
246:
241:
231:
227:
222:
218:
213:
208:
202:
200:
194:
191:
190:Binomial name
187:
183:
182:
177:
174:
173:
170:
169:
165:
162:
161:
158:
155:
152:
151:
148:
145:
142:
141:
138:
137:Selachimorpha
135:
133:Subdivision:
132:
131:
128:
125:
122:
121:
118:
115:
112:
111:
108:
105:
102:
101:
98:
95:
92:
91:
88:
85:
82:
81:
76:
71:
67:
61:
56:
45:
41:
36:
32:
27:
22:
19:
921:
890:
878:
867:H. nakamurai
866:
864:
857:
845:
833:
823:Heptranchias
821:
797:C. anguineus
796:
787:
775:
755:Subdivision
655:
650:
637:
632:
610:(1): 41–55.
607:
603:
599:
595:
589:
577:
561:
555:
547:
542:
476:H. nakamurai
475:
461:H. nakamurai
460:
446:H. nakamurai
445:
379:
376:Conservation
366:
352:
343:
339:
329:
319:
312:
297:
287:
279:
276:Measurements
244:
243:
239:
237:
229:
225:
198:
196:
180:
179:
167:
18:
1104:NatureServe
1052:iNaturalist
946:Wikispecies
880:Notorynchus
813:Hexanchidae
788:C. africana
523:Hexanchidae
433:Lower teeth
421:Upper teeth
331:Protocotyle
326:Monogeneans
257:Hexanchidae
228:(blue) and
157:Hexanchidae
1191:Categories
858:H. griseus
739:Vertebrata
737:Subphylum
640:Teng, 1962
534:References
270:caudal fin
123:Subclass:
1202:Hexanchus
847:Hexanchus
749:Subclass
340:Hexanchus
324:species.
304:Parasites
250:cow shark
175:Species:
168:Hexanchus
93:Kingdom:
87:Eukaryota
1109:2.788590
1070:11126745
1026:FishBase
1005:46560149
937:Q1548052
931:Wikidata
834:H. perlo
757:Selachii
733:Chordata
727:Animalia
725:Kingdom
644:Fishbase
624:21161490
566:Archived
496:See also
363:Behavior
334:(family
322:parasite
153:Family:
107:Chordata
103:Phylum:
97:Animalia
83:Domain:
60:IUCN 3.1
1044:2420579
731:Phylum
716:species
712:Extant
265:ventral
252:of the
248:) is a
209:, 1962)
163:Genus:
143:Order:
113:Class:
58: (
1174:105834
1161:147241
1148:105834
1135:598572
1122:303931
1096:161352
1083:564645
1057:102744
1018:124862
743:Class
662:
622:
261:dorsal
259:. Its
254:family
232:(red)
1169:WoRMS
1065:IRMNG
1013:EUNIS
992:3LGK9
979:85720
582:Euzet
478:, eye
1143:OBIS
1117:NCBI
1091:IUCN
1078:ITIS
1039:GBIF
974:BOLD
660:ISBN
620:PMID
409:Jaws
355:off
238:The
207:Teng
1031:638
1000:EoL
987:CoL
961:AFD
612:doi
1193::
1171::
1158::
1145::
1132::
1119::
1106::
1093::
1080::
1067::
1054::
1041::
1028::
1015::
1002::
989::
976::
963::
948::
933::
642:.
618:.
608:78
606:.
893:)
869:)
860:)
836:)
799:)
790:)
705:e
698:t
691:v
626:.
614::
296:(
242:(
205:(
62:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
