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Pelagic thresher

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with flat crowns and cusps with parallel ridges. The coloration is an intense dark blue above and white below; the white does not extend to above the pectoral fins. The color rapidly fades to gray after death. The dark pigment above the pectoral fins, the rounded pectoral fin tips, and the absence of
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The pelagic thresher has never been implicated in an attack on humans; it has small jaws and teeth for its size and tends to flee from divers. This shark is taken by commercial fisheries in the central Pacific and western Indian Oceans, as well as off California and Mexico. Abundant off northeastern
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later concluded was probably of a common thresher. Several authors, including Gohar and Mazhar (1964, Red Sea), Kato, Springer and Wagner (1967, Eastern Pacific), Fourmanoir and Laboute (1976, New Caledonia), Johnson (1978, Tahiti), and Faughnan (1980, Hawaiian Islands) have published illustrations
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are very small, numbering 21–22 rows on each side with a symphysial (central) row in the upper jaw and 21 on each side without a symphysial row in the lower jaw. Five to 11 rows of posterior teeth are present. The teeth are smooth-edged, with oblique cusps and lateral cusplets on the outside
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red muscles, responsible for generating heat in the common thresher, are positioned in two lateral strips just beneath the skin rather than at the core of the body. A rete system is present around the pelagic thresher's brain and eyes, albeit less developed than in the bigeye thresher, which may
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and feed on egg capsules produced by the mother. Each capsule measures about 55 mm (2.2 in) long and 12 mm (0.5 in) across, and contains 20–30 ova. Early-stage embryos have specialized teeth for opening the capsules, while later-stage embryos have their teeth hidden and
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at 2.8–2.9 m (9.2–9.5 ft) long and eight to nine years old, while males mature at 2.7–2.8 m (8.9–9.2 ft) long and seven to eight years old. The oldest confirmed ages for females and males are 16 and 14 years, respectively. Extrapolating the growth curves to the
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The pelagic thresher is the smallest of the thresher sharks, typically 3 m (10 ft) in length and 69.5 kg (153.3 lb) in weight, and usually not exceeding 3.3 m (10.8 ft) and 88.4 kg (194.9 lb). Males and females attain known maximum lengths of 3.5 m
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The growth rate of pelagic threshers slows with age: 9 cm/year for ages 0–1, 8 cm/year for ages 2–3, 6 cm/year for ages 5–6, 4 cm/year for ages 7–10, 3 cm/year for ages 10–12, and 2 cm/year for ages 13 and greater. Females reach
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Little information is available on the feeding ecology of the pelagic thresher. Its very slender tail and fine dentition suggest an exclusive diet of small, pelagic prey. Analysis of stomach contents reveals that pelagic threshers feed mainly on
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The head is narrow with a short, conical snout and a distinctive "pinched" profile when viewed from below. The eyes are very large in juveniles and decrease in relative size with age. No furrows occur at the corners of the mouth. The
1996: 350:. He illustrated one of the three specimens in his paper, "On the two species of the thresher shark from Formosan waters", published in August 1935. Nakamura also separately illustrated and described a 633: 938:
Rigby, C.L.; Barreto, R.; Carlson, J.; Fernando, D.; Fordham, S.; Francis, M.P.; Herman, K.; Jabado, R.W.; Liu, K.M.; Marshall, A.; Pacoureau, N.; Romanov, E.; Sherley, R.B.; Winker, H. (2019).
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largest known individuals suggests that females may have a lifespan exceeding 28 years, and males 17 years. A single female produces about 40 young over her entire life.
801:). Young pelagic threshers are born unusually large, up to 1.6 m (5.2 ft) long or 43% the length of the mother, which likely reduces predation on the newborns. 564: 748:
prey into a compact mass, before striking them sharply with the upper lobe of their tails to stun them. Because of this behavior, pelagic threshers are often hooked on
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swallow the capsules whole, their teeth not becoming functional again until just after birth. No evidence of sibling cannibalism has been found as in the
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Due to confusion with the common thresher, the distribution of the pelagic thresher may be wider than is currently known. It ranges extensively in the
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The diet of the pelagic thresher consists mainly of small midwater fishes, which are stunned with whip-like strikes of its tail. Along with all other
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The pelagic thresher is an active, strong swimmer and has been known to leap clear of the water (five times in a row on one documented occasion).
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spp.) inferred from mitochondrial DNA control region sequences". M.Sc. thesis. Moss Landing Marine Laboratories, California State University.
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Sepulveda, C.A.; Wegner, N.C.; Bernal, D. & Graham, J.B. (2005). "The red muscle morphology of the thresher sharks (family Alopiidae)".
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Liu, K.M.; Chen, C.T.; Liao, T.H. & Joung, S.J. (February 1999). "Age, Growth, and Reproduction of the Pelagic Thresher Shark,
2188: 1193: 65: 2246: 1962: 2079: 295:), even in professional publications, but can be distinguished by the dark, rather than white, color over the bases of its 1970: 1944: 1104: 233: 2105: 299:. The smallest of the three thresher species, the pelagic thresher typically measures 3 m (10 ft) long. 1431: 697: 102: 732:. Therefore, little competition occurs between the pelagic thresher and other large oceanic piscivores such as 2206: 744:, which tend to feed near the surface. As in other threshers, pelagic threshers may swim in circles to drive 830: 379: 366:
analysis conducted by Blaise Eitner in 1995 showed that the closest relative of the pelagic thresher is the
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is uncertain, but has been suggested to be less than one year as in the common thresher. The developing
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within the eastern and western Pacific pelagic thresher populations, but little flow between them.
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Weng, K.C. & Block, B.A. (2004). "Diel vertical migration of the bigeye thresher shark (
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Though rarely caught, pelagic threshers are also valued by sport fishers and are listed as
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Sharks of the World: An Annotated and Illustrated Catalogue of Shark Species Known to Date
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of the pelagic thresher can comprise 10% of its weight, and is used in the manufacture of
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Hiroshi Nakamura on the basis of three large specimens, none of which was designated a
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Otake, T. & Mizue, K. (1981). "Direct Evidence for Oophagy in Thresher Shark,
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Anatomical examination indicates that the pelagic thresher is unlikely to be
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of the pelagic thresher include larger fishes (including other sharks) and
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Pelagic threshers can be identified by the color above their pectoral fins
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from being dissipated into the water, inside its trunk. Furthermore, its
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Fishery Bulletin – National Oceanic and Atmospheric Administration
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records are from California. Pelagic threshers are frequently taken as
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Species Description of Alopias pelagicus at www.shark-references.com
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until they are 12 cm (4.7 in) long, after which they are
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for their meat, skin, liver oil, and fins, and are also pursued by
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Moteki, M.; Arai, M.; Tsuchiya, K. & Okamoto, H. (2001).
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Trejo, T. (2005). "Global phylogeography of thresher sharks (
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labial furrows separate this shark from the common thresher.
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Oiver, S. (2005). The behaviour of pelagic thresher sharks (
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Pelagic threshers are often caught as bycatch on longlines.
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of "common threshers" that were in fact pelagic threshers.
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serve to buffer those organs against temperature changes.
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are long and straight with broad, rounded tips. The first
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The pelagic thresher was originally described by Japanese
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and usually gives birth to litters of two. The developing
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meant for other species such as tuna, and also rarely in
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Eitner, B.J. (Aug 18, 1995). "Systematics of the Genus
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A male pelagic thresher being attended by cleaner fish
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margins. The body is covered with very small, smooth
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A pelagic thresher using tail slaps to hunt sardines
1891: 1848: 1839: 1802: 1778: 1769: 1741: 1732: 1704: 1695: 1658: 1625: 1601: 1592: 1564: 1555: 1509: 1500: 499:in the Red Sea and the Gulf of California, and off 1383:), a species possessing orbital retia mirabilia". 528:lobe nearly as long as the rest of the shark. The 963:10.2305/IUCN.UK.2019-3.RLTS.T161597A68607857.en 2252:Taxa named by Hiroshi Nakamura (ichthyologist) 328:International Union for Conservation of Nature 1432: 1300: 1298: 8: 483:The pelagic thresher primarily inhabits the 536:is placed halfway between the pectoral and 1879: 1845: 1775: 1738: 1701: 1598: 1561: 1506: 1439: 1425: 1417: 1014: 1012: 1010: 1008: 1006: 1004: 242: 59: 40: 31: 1263: 1128:Sharks, Rays, and Chimaeras of California 961: 1164: 1162: 1160: 1099: 507:. It has also been known to enter large 1121: 1119: 1117: 1097: 1095: 1093: 1091: 1089: 1087: 1085: 1083: 1081: 1079: 930: 898:. The largest overall records are from 560: 822:like the common thresher; it lacks a 7: 2207:B938C9C8-B3D4-4EBE-8E2E-FA2F2DB1FF4F 2158:ECA59D85-221A-2065-9024-EFE01AD32FED 1177:ReefQuest Centre for Shark Research. 949:IUCN Red List of Threatened Species 896:International Game Fish Association 1109:Florida Museum of Natural History. 25: 1170:Biology of the Pelagic Thresher ( 2232:IUCN Red List endangered species 1265:10.1046/j.1444-2906.2001.00362.x 1220:) in relation to cleaning fish ( 599: 587: 575: 563: 392:, meaning "of the sea". Another 306:, the pelagic thresher exhibits 101: 1346:Journal of Experimental Biology 1285:Japanese Journal of Ichthyology 1179:Retrieved on December 22, 2008. 1111:Retrieved on December 22, 2008. 1309:in the Northwestern Pacific". 887:, and high-grade machine oil. 408:, with scattered records from 1: 491:, and has been observed near 867:, and the fins are used for 683:, which infest the skin. At 671:, which inhabit the shark's 656:of this species include the 396:is the smalltooth thresher. 2268: 764:, the pelagic thresher is 1456: 1019:Compagno, L.J.V. (2002). 728:, all inhabitants of the 374:), with which it forms a 330:assessed this species as 250: 241: 223: 216: 98:Scientific classification 96: 79: 57: 48: 39: 34: 2242:Marine fish of Nicaragua 1206:. December 2008 version. 1192:; Pauly, Daniel (eds.). 400:Distribution and habitat 251:Geographic range (blue) 1814:Smalltooth sand tiger ( 831:countercurrent exchange 2247:Fish described in 1935 956:: e.T161597A68607857. 855: 661:Litobothrium amplifica 641: 628: 338:Taxonomy and phylogeny 1637:Shortfin mako shark ( 1413:on Sealife Collection 1381:Alopias superciliosus 853: 833:system that prevents 760:Like the rest of the 639: 626: 1646:Longfin mako shark ( 1352:(Pt 22): 4255–4261. 1222:Labroides dimidiatus 1126:Ebert, D.A. (2003). 985:"Appendices | CITES" 910:on longlines and in 698:Labroides dimidiatus 476:has shown extensive 320:commercial fisheries 1823:Bigeye sand tiger ( 1613:Great white shark ( 1256:2001FisSc..67.1063M 784:are sustained by a 612:Biology and ecology 472:years. Analysis of 51:Conservation status 1841:Pseudocarchariidae 1790:Sand tiger shark ( 1521:Pelagic thresher ( 856: 846:Human interactions 772:. With no defined 642: 629: 267:) is a species of 2217: 2216: 2140:Open Tree of Life 2002:alopias-pelagicus 1963:alopias-pelagicus 1950:Alopias_pelagicus 1937:Alopias_pelagicus 1923:Alopias pelagicus 1893:Alopias pelagicus 1885:Taxon identifiers 1876: 1875: 1872: 1871: 1860:Crocodile shark ( 1835: 1834: 1765: 1764: 1728: 1727: 1716:Megamouth shark ( 1691: 1690: 1588: 1587: 1551: 1550: 1539:Common thresher ( 1530:Bigeye thresher ( 1358:10.1242/jeb.01898 1307:Alopias pelagicus 1281:Alopias pelagicus 1244:Fisheries Science 1218:Alopias pelagicus 1196:Alopias pelagicus 1172:Alopias pelagicus 942:Alopias pelagicus 799:Carcharias taurus 704:Thalassoma lunare 685:Malapascua Island 637: 624: 489:continental shelf 474:mitochondrial DNA 466:Galapagos Islands 264:Alopias pelagicus 255: 254: 227:Alopias pelagicus 209:A. pelagicus 91: 74: 35:Pelagic thresher 18:Alopias pelagicus 16:(Redirected from 2259: 2210: 2209: 2197: 2196: 2184: 2183: 2174: 2173: 2161: 2160: 2148: 2147: 2135: 2134: 2122: 2121: 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521: 513:Tuamotu Islands 444:, northwestern 440:, southeastern 402: 368:bigeye thresher 340: 304:mackerel sharks 289:common thresher 237: 231: 225: 212: 100: 92: 75: 64: 60: 53: 28: 23: 22: 15: 12: 11: 5: 2265: 2263: 2255: 2254: 2249: 2244: 2239: 2234: 2224: 2223: 2215: 2214: 2212: 2211: 2198: 2185: 2175: 2162: 2149: 2136: 2123: 2110: 2097: 2084: 2071: 2058: 2045: 2032: 2019: 2006: 1993: 1980: 1967: 1954: 1941: 1928: 1913: 1897: 1895: 1889: 1888: 1883: 1874: 1873: 1870: 1869: 1867: 1866: 1856: 1854: 1843: 1837: 1836: 1833: 1832: 1830: 1829: 1820: 1810: 1808: 1800: 1799: 1797: 1796: 1786: 1784: 1773: 1771:Odontaspididae 1767: 1766: 1763: 1762: 1760: 1759: 1753:Goblin shark ( 1749: 1747: 1736: 1734:Mitsukurinidae 1730: 1729: 1726: 1725: 1723: 1722: 1712: 1710: 1699: 1693: 1692: 1689: 1688: 1686: 1685: 1676: 1670:Salmon shark ( 1666: 1664: 1656: 1655: 1653: 1652: 1643: 1633: 1631: 1623: 1622: 1620: 1619: 1609: 1607: 1596: 1590: 1589: 1586: 1585: 1583: 1582: 1572: 1570: 1559: 1553: 1552: 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1639:I. oxyrinchus 1635: 1634: 1632: 1630: 1629: 1624: 1618: 1616: 1615:C. carcharias 1611: 1610: 1608: 1606: 1605: 1600: 1597: 1595: 1591: 1581: 1579: 1574: 1573: 1571: 1569: 1568: 1563: 1560: 1558: 1554: 1544: 1542: 1537: 1535: 1533: 1528: 1526: 1524: 1519: 1518: 1516: 1514: 1513: 1508: 1505: 1503: 1499: 1493: 1489: 1487: 1483: 1481: 1477: 1475: 1471: 1469: 1465: 1463: 1459: 1458: 1455: 1450: 1442: 1437: 1435: 1430: 1428: 1423: 1422: 1419: 1412: 1408: 1406: 1403: 1402: 1398: 1391:(1): 221–229. 1390: 1386: 1382: 1375: 1372: 1367: 1363: 1359: 1355: 1351: 1347: 1340: 1337: 1332: 1328: 1324: 1320: 1316: 1312: 1308: 1301: 1299: 1295: 1291:(2): 171–172. 1290: 1286: 1282: 1275: 1272: 1266: 1261: 1257: 1253: 1249: 1245: 1241: 1234: 1231: 1227: 1223: 1219: 1213: 1210: 1205: 1204: 1199: 1197: 1191: 1185: 1182: 1178: 1175: 1173: 1168:Martin, R.A. 1165: 1163: 1161: 1157: 1153: 1147: 1144: 1139: 1137:0-520-23484-7 1133: 1129: 1122: 1120: 1118: 1114: 1110: 1106: 1100: 1098: 1096: 1094: 1092: 1090: 1088: 1086: 1084: 1082: 1080: 1076: 1071: 1067: 1063: 1059: 1055: 1051: 1047: 1040: 1037: 1032: 1030:92-5-104543-7 1026: 1022: 1015: 1013: 1011: 1009: 1007: 1005: 1001: 990: 986: 980: 977: 964: 959: 955: 951: 950: 945: 943: 934: 931: 925: 923: 921: 917: 913: 909: 905: 901: 897: 893: 888: 886: 882: 878: 874: 871:in Asia. The 870: 866: 862: 852: 845: 843: 840: 836: 832: 829: 825: 824:rete mirabile 821: 813: 811: 808: 802: 800: 796: 791: 787: 783: 779: 775: 771: 767: 766:ovoviviparous 763: 755: 753: 751: 747: 743: 742:dolphinfishes 739: 735: 731: 727: 723: 719: 710: 708: 706: 705: 700: 699: 694: 690: 686: 682: 681:Echthrogaleus 679:of the genus 678: 674: 670: 666: 662: 659: 655: 651: 647: 611: 602: 597: 590: 585: 578: 573: 566: 561: 559: 556: 551: 545: 543: 539: 535: 531: 530:pectoral fins 527: 518: 516: 514: 510: 506: 502: 498: 494: 490: 486: 481: 479: 475: 471: 467: 463: 459: 455: 451: 450:New Caledonia 447: 443: 439: 435: 431: 427: 423: 419: 415: 411: 407: 399: 397: 395: 391: 388: 384: 381: 377: 373: 369: 365: 360: 357: 353: 349: 348:type specimen 345: 344:ichthyologist 337: 335: 333: 329: 325: 324:sport fishers 321: 317: 313: 309: 308:ovoviviparity 305: 300: 298: 297:pectoral fins 294: 290: 286: 282: 278: 274: 270: 266: 265: 260: 249: 245: 240: 235: 230: 228: 222: 219: 218:Binomial name 215: 211: 210: 205: 202: 201: 198: 197: 193: 190: 189: 186: 183: 180: 179: 176: 173: 170: 169: 166: 165:Selachimorpha 163: 161:Subdivision: 160: 159: 156: 153: 150: 149: 146: 143: 140: 139: 136: 133: 130: 129: 126: 123: 120: 119: 116: 113: 110: 109: 104: 99: 95: 89: 83: 78: 72: 67: 56: 52: 47: 43: 38: 33: 30: 19: 2219: 1892: 1862:P. kamoharai 1861: 1849: 1824: 1815: 1803: 1791: 1779: 1754: 1742: 1717: 1705: 1680: 1671: 1659: 1647: 1638: 1626: 1614: 1602: 1577: 1565: 1557:Cetorhinidae 1540: 1531: 1523:A. pelagicus 1522: 1520: 1510: 1490:Subdivision 1388: 1384: 1380: 1374: 1349: 1345: 1339: 1314: 1310: 1306: 1288: 1284: 1280: 1274: 1247: 1243: 1233: 1225: 1221: 1217: 1212: 1201: 1195: 1184: 1176: 1171: 1151: 1146: 1127: 1108: 1103:Seitz, J.C. 1053: 1049: 1045: 1039: 1020: 992:. Retrieved 988: 979: 967:. Retrieved 953: 947: 941: 933: 904:light tackle 902:, while the 889: 885:health foods 873:squalene oil 857: 828:blood vessel 817: 803: 798: 759: 756:Life history 718:barracudinas 714: 702: 696: 680: 673:spiral valve 668: 664: 660: 643: 546: 522: 495:dropoffs or 482: 410:South Africa 406:Indo-Pacific 403: 389: 385:is from the 382: 371: 361: 341: 301: 292: 263: 262: 258: 256: 226: 224: 208: 207: 195: 29: 2049:iNaturalist 1917:Wikispecies 1825:O. noronhai 1744:Mitsukurina 1718:M. pelagios 1679:Porbeagle ( 1672:L. ditropis 1604:Carcharodon 1541:A. vulpinus 969:19 November 900:New Zealand 820:warm-bodied 722:lightfishes 689:Philippines 538:pelvic fins 519:Description 418:Arabian Sea 394:common name 293:A. vulpinus 277:caudal fins 234:H. Nakamura 175:Lamniformes 84:Appendix II 2226:Categories 1805:Odontaspis 1781:Carcharias 1755:M. owstoni 1707:Megachasma 1578:C. maximus 1567:Cetorhinus 1474:Vertebrata 1472:Subphylum 1409:Photos of 994:2022-01-14 926:References 734:billfishes 669:L. nickoli 665:L. daileyi 544:are tiny. 534:dorsal fin 526:caudal fin 505:Micronesia 493:coral reef 485:open ocean 464:, and the 462:California 432:, and off 424:, between 416:, and the 332:endangered 151:Subclass: 66:Endangered 2237:Alopiidae 1792:C. taurus 1648:I. paucus 1502:Alopiidae 1484:Subclass 989:cites.org 912:driftnets 892:game fish 881:cosmetics 790:oophagous 750:longlines 746:schooling 658:tapeworms 654:parasites 646:Predators 542:anal fins 501:Indonesia 497:seamounts 478:gene flow 456:, to the 446:Australia 383:pelagicus 334:in 2019. 316:oophagous 273:Alopiidae 271:, family 203:Species: 185:Alopiidae 121:Kingdom: 115:Eukaryota 2166:Species+ 2067:10838022 2023:FishBase 1908:Q1274522 1902:Wikidata 1816:O. ferox 1681:L. nasus 1594:Lamnidae 1492:Selachii 1468:Chordata 1462:Animalia 1460:Kingdom 1366:16272248 1203:FishBase 916:gillnets 807:maturity 786:yolk sac 726:escolars 677:copepods 652:. Known 434:Pakistan 390:pelagios 364:allozyme 181:Family: 135:Chordata 131:Phylum: 125:Animalia 111:Domain: 71:IUCN 3.1 2202:ZooBank 2041:2420809 1512:Alopias 1466:Phylum 1451:species 1447:Extant 1331:1447386 1252:Bibcode 1152:Alopias 1070:1446753 1046:Alopias 908:bycatch 894:by the 875:in the 865:leather 839:aerobic 782:embryos 711:Feeding 687:in the 511:in the 509:lagoons 470:El Nino 422:Somalia 414:Red Sea 354:, that 312:embryos 196:Alopias 191:Genus: 171:Order: 141:Class: 86: ( 69: ( 2194:220019 2181:179562 2178:uBio: 2145:801808 2132:220019 2119:598555 2093:161597 2080:159922 2015:130932 1958:ARKive 1628:Isurus 1478:Class 1364:  1329:  1311:Copeia 1224:& 1134:  1068:  1050:Copeia 1027:  861:Taiwan 770:uterus 740:, and 724:, and 667:, and 454:Tahiti 452:, and 436:), to 412:, the 378:. The 326:. The 281:Indian 236:, 1935 2189:WoRMS 2171:68007 2153:Plazi 2106:57979 2062:IRMNG 2054:68050 2010:EUNIS 1976:72350 1661:Lamna 1327:JSTOR 1066:JSTOR 877:liver 738:tunas 606:Teeth 594:Teeth 550:teeth 442:Japan 438:China 430:India 420:(off 387:Greek 376:clade 352:fetus 88:CITES 82:CITES 2127:OBIS 2101:NCBI 2088:IUCN 2075:ITIS 2036:GBIF 2028:5891 1989:C5K6 1971:BOLD 1362:PMID 1315:1999 1132:ISBN 1054:1995 1025:ISBN 971:2021 954:2019 918:and 826:, a 701:and 582:Jaws 503:and 428:and 426:Oman 314:are 283:and 257:The 1997:CMS 1984:CoL 1945:AFD 1932:ADW 1389:102 1354:doi 1350:208 1319:doi 1283:". 1260:doi 1058:doi 958:doi 362:An 2228:: 2204:: 2191:: 2168:: 2155:: 2142:: 2129:: 2116:: 2103:: 2090:: 2077:: 2064:: 2051:: 2038:: 2025:: 2012:: 1999:: 1986:: 1973:: 1960:: 1947:: 1934:: 1919:: 1904:: 1387:. 1360:. 1348:. 1325:. 1313:. 1297:^ 1289:28 1287:. 1258:. 1248:67 1246:. 1242:. 1200:. 1174:). 1159:^ 1116:^ 1107:. 1078:^ 1064:. 1052:. 1003:^ 987:. 952:. 946:. 922:. 883:, 736:, 720:, 663:, 515:. 460:, 448:, 1864:) 1827:) 1818:) 1794:) 1757:) 1720:) 1683:) 1674:) 1650:) 1641:) 1617:) 1580:) 1543:) 1534:) 1525:) 1440:e 1433:t 1426:v 1368:. 1356:: 1333:. 1321:: 1268:. 1262:: 1254:: 1198:" 1194:" 1140:. 1072:. 1060:: 1033:. 997:. 973:. 960:: 944:" 940:" 797:( 695:( 370:( 291:( 261:( 90:) 73:) 20:)

Index

Alopias pelagicus

Conservation status
Endangered
IUCN 3.1
CITES
CITES
Scientific classification
Edit this classification
Eukaryota
Animalia
Chordata
Chondrichthyes
Elasmobranchii
Selachimorpha
Lamniformes
Alopiidae
Alopias
Binomial name
H. Nakamura

thresher shark
Alopiidae
caudal fins
Indian
Pacific Oceans
common thresher
pectoral fins
mackerel sharks
ovoviviparity

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