Knowledge (XXG)

Sharpnose sevengill shark

Source πŸ“

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are very thin and transparent; each is longer than it is broad, bearing a distinct median ridge and two lateral ridges ending in marginal teeth. The coloration is brownish gray to olive above and lighter below; some individuals have dark blotches on the body or light posterior fin margins. Juveniles
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for this species include one-finned shark, perlon shark, sevengill cow shark, sevengilled Mediterranean shark, sevengilled shark, sharpnose seven-gill shark, snouted sevengill shark and slender sevengill shark. Some authors believe this species is distinct enough to merit its own family,
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is said to be of good quality, but the flesh is considered to be mildly poisonous when consumed. When captured, it is very active and quick to bite, but it does not pose a substantial threat to people due to its small size. It has occasionally been kept in captivity in
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species usually captured at a depth of 300–600 m (980–1,970 ft), but is occasionally found close to the surface (though these reports may represent misidentifications) or down to 1,000 m (3,300 ft). It is mainly found on the outer
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The sharpnose sevengill shark is reasonably small and is located in generally deep water, and these characteristics classify this shark as harmless to humans. Small to moderate numbers of sharpnose sevengill sharks are captured as
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Usually measuring 60–120 cm (2.0–3.9 ft) long, sharpnose sevengill sharks attain a maximum length of 1.4 m (4.6 ft). This species has a slender,
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measure about 26 cm (10 in) long. Males mature at 75–85 cm (2.46–2.79 ft) long and females at 90–100 cm (3.0–3.3 ft). The onset of
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Some concern exists that populations of this slow-reproducing species may be declining in areas of sustained deepwater fishing, and it has been assessed as
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are the second-most common prey taken after teleosts. Off Australia, this species consumes mostly teleosts, with smaller individuals taking mainly
1813: 1606: 749:. It is a strong-swimming species, with feeding and activity level increasing at night. This species may be preyed upon by larger sharks. Known 1119:"Feeding ecology of two high-order predators from south-eastern Australia: the coastal broadnose and the deepwater sharpnose sevengill sharks" 1681: 859:
classified the sharpnose sevengill shark as "At Risk – Naturally Uncommon" with the qualifiers "Data Poor" and "Secure Overseas" under the
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Duffy, Clinton A. J.; Francis, Malcolm; Dunn, M. R.; Finucci, Brit; Ford, Richard; Hitchmough, Rod; Rolfe, Jeremy (2018).
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in the ecosystem it inhabits. At the Great Meteor Seamount in the eastern Atlantic, this species feeds primarily on
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On 26 September 2019, in the morning, a dead carcass was found on Torre Pali's beach, one small locality in
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Sharks of the World: An Annotated and Illustrated Catalogue of Shark Species Known to Date
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Paul, L. & Fowler, S. (SSG Australia & Oceania Regional Workshop, March 2003).
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have dark blotches on the flank and dark tips on the dorsal fin and upper caudal lobe.
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Conservation status of New Zealand chondrichthyans (chimaeras, sharks and rays), 2016
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as opposed to the usual five. The other shark species with seven gill slits is the
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Despite its relatively small size, the sharpnose sevengill shark is considered a
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meaning "throttle", referring to this shark's seven pairs of gill slits. Other
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The sharpnose sevengill shark is uncommon, but widely distributed in the
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is more than twice the dorsal fin base. The closely overlapping
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is long, and the distance between the dorsal fin origin and the
617:. The upper teeth are narrow and hook-shaped with small lateral 594: 482: 426: 1414: 1188: 421:. Though small, this shark is an active, voracious predator of 976:"Heptranchias perlo :: Florida Museum of Natural History" 1057:
Florida Museum of Natural History Ichthyology Department
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and larger individuals taking increasing numbers of
1749: 1423: 1380: 1347: 1323: 1314: 1277: 1268: 473:regions of all oceans except for the northeastern 636:are small with a weakly convex outer margin. The 970: 968: 605:is narrow and strongly curved, containing 9-11 1053:Biological Profiles: Sharpnose Sevengill Shark 1200: 889:List of prehistoric cartilaginous fish genera 8: 961:10.2305/IUCN.UK.2003.RLTS.T41823A10572878.en 789:in males may be marked by the formation of 640:is small with nearly straight margins. The 407:, and the only living species in the genus 1411: 1320: 1274: 1207: 1193: 1185: 1084: 1082: 1001: 999: 997: 995: 955:. The IUCN Red List of Threatened Species 501:. In the eastern Atlantic, it occurs from 295: 128: 109: 20: 1134: 753:of the sharpnose sevengill shark include 533:. In the Pacific Ocean, it is known from 1047: 1045: 1043: 1041: 1039: 1037: 1035: 861:New Zealand Threat Classification System 900: 655: 304:Range of the sharpnose sevengill shark 947: 945: 943: 941: 939: 593:body with a narrow, pointed head. The 1855:IUCN Red List near threatened species 613:and five teeth on either side of the 7: 1726:F6984802-DDCD-CA81-8892-03E6D49A0EC2 1674:2f54c0dd-b9fd-4dc6-9f11-ac305f0e1ae6 1117:Braccini, J.M. (November 19, 2008). 1074:ReefQuest Centre for Shark Research 914:Bulletins of American Paleontology 723:, and to a lesser extent on small 14: 1076:. Retrieved on February 17, 2009. 1059:. Retrieved on February 16, 2009. 1016:Food and Agriculture Organization 1289:Southern African frilled shark ( 694: 682: 670: 658: 153: 1006:Compagno, Leonard J.V. (1984). 855:. In June 2018 the New Zealand 1123:Marine Ecology Progress Series 1: 601:green in live specimens. The 346:Notidanus cinereus pristiurus 1392:Broadnose sevengill shark ( 1335:Sharpnose sevengill shark ( 738:Lepidorhynchus denticulatus 577:, and may aggregate around 1881: 1070:Hexanchiformes: Cow Sharks 857:Department of Conservation 513:. It is reported from the 448:meaning "seven arms", and 1359:Bluntnose sixgill shark ( 1224: 485:, including the northern 419:broadnose sevengill shark 373:sharpnose sevengill shark 335:Jordan & Starks, 1901 315: 308: 303: 294: 275: 268: 150:Scientific classification 148: 126: 117: 108: 24:Sharpnose sevengill shark 23: 1106:. February 2009 version. 1092:; Pauly, Daniel (eds.). 853:World Conservation Union 461:Distribution and habitat 1368:Bigeyed sixgill shark ( 908:Sepkoski, Jack (2002). 1865:Fish described in 1788 801:Relationship to humans 772:Crossobothrium dohrnii 628:is located behind the 609:on either side of the 393:sharpsnouted sevengill 1708:Paleobiology Database 1217:frilled and cow shark 920:: 560. Archived from 810:in certain deepwater 924:on February 23, 2008 822:. They are used for 812:commercial fisheries 725:cartilaginous fishes 843:Conservation status 793:on the tips of the 707:Biology and ecology 597:are very large and 477:. It is found from 389:sevengill cow shark 325:Heptranchias dakini 120:Conservation status 1495:heptranchias-perlo 1482:Heptranchias_perlo 1455:Heptranchias perlo 1425:Heptranchias perlo 1270:Chlamydoselachidae 1096:Heptranchias perlo 953:Heptranchias perlo 399:, is a species of 377:Heptranchias perlo 332:Heptranchias deani 318:Heptranchias angio 279:Heptranchias perlo 1842: 1841: 1695:Open Tree of Life 1417:Taxon identifiers 1408: 1407: 1404: 1403: 1310: 1309: 1136:10.3354/meps07684 980:www.flmnh.ufl.edu 787:sexual maturation 575:continental slope 571:continental shelf 517:off southwestern 511:Mediterranean Sea 397:slender sevengill 379:), also known as 369: 368: 364: 357: 350: 343: 336: 329: 322: 143: 103: 1872: 1835: 1834: 1822: 1821: 1809: 1808: 1796: 1795: 1783: 1782: 1770: 1769: 1768: 1742: 1741: 1729: 1728: 1716: 1715: 1703: 1702: 1690: 1689: 1677: 1676: 1667: 1666: 1654: 1653: 1651:NHMSYS0000335551 1641: 1640: 1628: 1627: 1615: 1614: 1602: 1601: 1589: 1588: 1576: 1575: 1563: 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207:Elasmobranchii 204: 200: 199: 197:Chondrichthyes 194: 190: 189: 184: 180: 179: 174: 170: 169: 164: 160: 159: 146: 145: 127: 124: 123: 118: 115: 114: 106: 105: 91: 86: 81: 76: 71: 66: 61: 56: 51: 46: 41: 36: 35: 26: 15: 13: 10: 9: 6: 4: 3: 2: 1877: 1866: 1863: 1861: 1858: 1856: 1853: 1852: 1850: 1833: 1828: 1824: 1820: 1815: 1811: 1807: 1802: 1798: 1794: 1789: 1785: 1781: 1776: 1772: 1767: 1761: 1757: 1756: 1754: 1752: 1751:Squalus perlo 1748: 1740: 1735: 1731: 1727: 1722: 1718: 1714: 1709: 1705: 1701: 1696: 1692: 1688: 1683: 1679: 1675: 1669: 1665: 1660: 1656: 1652: 1647: 1643: 1639: 1634: 1630: 1626: 1621: 1617: 1613: 1608: 1604: 1600: 1595: 1591: 1587: 1582: 1578: 1574: 1569: 1565: 1561: 1556: 1552: 1548: 1543: 1539: 1535: 1530: 1526: 1522: 1517: 1513: 1509: 1504: 1500: 1496: 1491: 1487: 1483: 1478: 1474: 1470: 1465: 1461: 1456: 1450: 1446: 1441: 1435: 1431: 1430: 1428: 1426: 1422: 1418: 1413: 1397: 1395: 1394:N. cepedianus 1390: 1389: 1387: 1385: 1384: 1379: 1373: 1371: 1366: 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747:cutlassfishes 744: 740: 739: 734: 730: 726: 722: 718: 714: 706: 697: 692: 685: 680: 673: 668: 661: 656: 654: 651: 647: 643: 639: 635: 634:pectoral fins 631: 627: 622: 620: 616: 612: 608: 604: 600: 596: 592: 584: 582: 580: 576: 572: 567: 563: 558: 556: 552: 548: 544: 540: 536: 532: 528: 524: 520: 516: 512: 508: 504: 500: 496: 492: 488: 484: 480: 476: 475:Pacific Ocean 472: 468: 460: 458: 455: 451: 447: 444: 440: 432: 430: 428: 424: 423:invertebrates 420: 416: 412: 411: 406: 402: 398: 394: 390: 386: 382: 378: 374: 365: 361: 360:Squalus perlo 354: 347: 340: 333: 328:Whitley, 1931 326: 319: 314: 311: 307: 302: 298: 293: 288: 282: 280: 274: 271: 270:Binomial name 267: 263: 262: 261:H. perlo 257: 254: 253: 250: 249: 245: 242: 241: 238: 235: 232: 231: 228: 225: 222: 221: 218: 217:Selachimorpha 215: 213:Subdivision: 212: 211: 208: 205: 202: 201: 198: 195: 192: 191: 188: 185: 182: 181: 178: 175: 172: 171: 168: 165: 162: 161: 156: 151: 147: 141: 136: 125: 121: 116: 112: 107: 101: 94: 89: 84: 79: 74: 69: 64: 59: 54: 49: 44: 39: 33: 22: 19: 1860:Heptranchias 1750: 1469:Heptranchias 1424: 1393: 1381: 1370:H. nakamurai 1369: 1360: 1348: 1336: 1334: 1326:Heptranchias 1325: 1324: 1300:C. anguineus 1299: 1290: 1278: 1258:Subdivision 1152: 1145: 1126: 1122: 1112: 1101: 1095: 1073: 1064: 1056: 1007: 983:. Retrieved 979: 952: 926:. Retrieved 922:the original 917: 913: 903: 870: 846: 804: 776: 771: 765:Contracaecum 764: 758: 736: 713:top predator 710: 623: 588: 559: 531:South Africa 515:Indian Ocean 464: 454:common names 449: 445: 441:is from the 439:Heptranchias 438: 436: 410:Heptranchias 409: 408: 396: 392: 388: 385:perlon shark 384: 380: 376: 372: 370: 359: 356:Gmelin, 1789 352: 345: 338: 331: 324: 317: 316: 278: 276: 260: 259: 248:Heptranchias 247: 18: 1633:NatureServe 1581:iNaturalist 1449:Wikispecies 1383:Notorynchus 1316:Hexanchidae 1291:C. africana 1129:: 273–284. 1051:Bester, C. 733:crustaceans 721:cephalopods 701:Lower teeth 689:Upper teeth 630:pelvic fins 585:Description 566:semipelagic 551:New Zealand 525:, southern 489:, and from 405:Hexanchidae 342:Costa, 1857 321:Costa, 1857 237:Hexanchidae 1849:Categories 1766:Q107055416 1361:H. griseus 1242:Vertebrata 1240:Subphylum 1175:1042901090 985:2016-04-04 928:January 9, 895:References 767:, and the 646:caudal fin 626:dorsal fin 573:and upper 560:This is a 527:Mozambique 415:gill slits 287:Bonnaterre 203:Subclass: 102:to Present 30:61–0  1350:Hexanchus 1252:Subclass 867:Curiosity 828:liver oil 816:longlines 755:nematodes 751:parasites 611:upper jaw 599:fluoresce 579:seamounts 547:Australia 543:Indonesia 495:Argentina 491:Venezuela 471:temperate 255:Species: 173:Kingdom: 167:Eukaryota 1760:Wikidata 1638:2.788587 1599:10840914 1555:FishBase 1534:46560146 1440:Q1126774 1434:Wikidata 1337:H. perlo 1260:Selachii 1236:Chordata 1230:Animalia 1228:Kingdom 1103:FishBase 883:See also 824:fishmeal 795:claspers 783:newborns 760:Anisakis 717:teleosts 638:anal fin 591:fusiform 562:demersal 499:Atlantic 467:tropical 433:Taxonomy 310:Synonyms 233:Family: 187:Chordata 183:Phylum: 177:Animalia 163:Domain: 140:IUCN 3.1 1806:4288032 1573:2420586 1234:Phylum 1219:species 1215:Extant 873:Salento 851:by the 808:bycatch 769:cestode 729:Tunisia 507:Namibia 503:Morocco 450:agchein 289:, 1788) 243:Genus: 223:Order: 193:Class: 138: ( 1832:299196 1819:159850 1793:121508 1739:105832 1713:246556 1700:281365 1687:105832 1671:NZOR: 1664:212740 1612:159844 1586:102646 1547:124149 1490:ARKive 1246:Class 1173:  1163:  1022:  830:; the 820:trawls 818:or in 727:. Off 529:, and 446:heptra 100:Danian 1827:WoRMS 1788:EUNIS 1780:6ZG23 1734:WoRMS 1721:Plazi 1625:41823 1594:IRMNG 1542:EUNIS 1521:3KX95 1508:78493 1157:(PDF) 877:Italy 837:Japan 791:mucus 619:cusps 615:lower 607:teeth 603:mouth 555:Chile 539:China 535:Japan 519:India 443:Greek 401:shark 1814:ITIS 1801:GBIF 1682:OBIS 1659:NCBI 1620:IUCN 1607:ITIS 1568:GBIF 1503:BOLD 1171:OCLC 1161:ISBN 1020:ISBN 1012:Rome 930:2008 832:meat 826:and 763:and 745:and 719:and 677:Jaws 665:Head 595:eyes 483:Cuba 469:and 427:fish 425:and 371:The 38:Preκž’ 1775:CoL 1646:NBN 1560:636 1529:EoL 1516:CoL 1477:AFD 1464:ADW 1131:doi 1127:371 957:doi 918:364 879:). 814:on 564:to 537:to 505:to 493:to 481:to 395:or 1851:: 1829:: 1816:: 1803:: 1790:: 1777:: 1762:: 1736:: 1723:: 1710:: 1697:: 1684:: 1661:: 1648:: 1635:: 1622:: 1609:: 1596:: 1583:: 1570:: 1557:: 1544:: 1531:: 1518:: 1505:: 1492:: 1479:: 1466:: 1451:: 1436:: 1169:. 1125:. 1121:. 1100:. 1081:^ 1072:. 1055:. 1034:^ 1018:. 1014:: 1010:. 994:^ 978:. 967:^ 938:^ 916:. 912:. 863:. 839:. 797:. 774:. 731:, 581:. 557:. 549:, 545:, 541:, 521:, 391:, 387:, 383:, 88:Pg 32:Ma 1396:) 1372:) 1363:) 1339:) 1302:) 1293:) 1208:e 1201:t 1194:v 1177:. 1139:. 1133:: 1098:" 1094:" 1028:. 988:. 959:: 932:. 875:( 375:( 285:( 142:) 93:N 83:K 78:J 73:T 68:P 63:C 58:D 53:S 48:O 43:κž’

Index

Ma
Preκž’
κž’
O
S
D
C
P
T
J
K
Pg
N
Danian

Conservation status
Near Threatened
IUCN 3.1
Scientific classification
Edit this classification
Eukaryota
Animalia
Chordata
Chondrichthyes
Elasmobranchii
Selachimorpha
Hexanchiformes
Hexanchidae
Heptranchias
Binomial name

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