Скачать или смотреть 白鰭鯊 Whitetip reef shark

白鰭鯊 Whitetip reef shark (Triaenodon obesus)

白鰭鯊又稱灰三齒鯊或白頂礁鯊，是真鯊科灰三齒鯊屬的唯一成員，為中型礁鯊，體長平均140-160厘米，最長可達244厘米，體重至28公斤，上身呈灰白或褐色，頭部寬平扁，背鰭與上尾鰭頂端有醒目白色，體型細長、鰭小。

這種鯊魚棲息於熱帶印太洋珊瑚礁，從紅海延伸至太平洋島嶼，具夜行性，白天常群聚於洞穴或裂縫休息，夜間活躍捕食底棲魚類、章魚、龍蝦與螃蟹，遷移範圍小（年內僅0-3公里），性情溫和但受騷擾時可能反擊。

​繁殖為胎生，一胎僅1-5隻幼鯊（出生長50-60厘米），壽命可達25年；國際自然保護聯盟瀕危物種紅色名錄（IUCN Red List）列為易危（Vulnerable），主要受過度捕撈、副漁獲及珊瑚礁破壞影響，自2023年11月起列入CITES附錄II管制國際貿易，全球正努力遏止無管制漁業，但盜捕問題仍存。

The whitetip reef shark, also known as the grey whitetip or white-tip reef shark, is the sole member of the genus Triaenodon in the houndshark family, classified as a medium-sized reef shark with an average length of 140-160 cm, maximum up to 244 cm, and weight reaching 28 kg; its body is grayish-white or brown, with a flattened wide head, slender form, small fins, and distinctive white tips on the first dorsal and upper caudal fins.

This shark inhabits tropical Indo-Pacific coral reefs, ranging from the Red Sea to Pacific islands, exhibiting nocturnal habits by resting in groups inside caves or crevices during the day and actively hunting bottom-dwelling fish, octopuses, lobsters, and crabs at night, with limited migration (0-3 km annually) and a generally docile temperament that turns defensive when provoked.

​It reproduces viviparously, producing litters of 1-5 pups (50-60 cm at birth), potentially living up to 25 years; listed as Vulnerable on the IUCN Red List of Threatened Species due to overfishing, bycatch, and coral reef degradation, it has been regulated under CITES Appendix II since November 2023 to control international trade, though illegal poaching persists despite global efforts to curb unregulated fisheries.

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