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Names
Scientific Name：Carcharhinus obscurus
ZH Common Names：灰真鲨
EN Common Names：Dusky shark
Classification
Chordata > Cartilaginous fish > Sharks > Whaler sharks > Requiem sharks > Carcharhinus
Descriptions
学名、命名者与年份 : Carcharhinus obscurus (Lesueur, 1818)
棲息深度 : 0 - 400
最大體長 : 420 cm
简介 :
俗名大沙、灰色白眼鮫。棲息於礁區、0-400公尺，無毒性，可食用，無觀賞價值，是經濟性魚類，分布於全球，產於臺灣東部，最大體長420 cm，模式種產於美國東岸。
形態特徵 :
體呈紡錘型，軀幹略粗壯。2個，背鰭間存在低的隆脊，第一背鰭寬大，起點與胸鰭內角相對，後緣凹入，上角鈍尖，下角尖突；第二背鰭小，起點與臀鰭起點相對，後緣入凹，後角尖突；胸鰭大型，鐮刀形，後緣凹入，外角鈍尖，內角鈍圓，鰭端伸達第一背鰭基底後端；尾鰭寬長，尾椎軸上揚，下葉前部顯著三角形突出，中部低平延長，與後部間有一深缺刻，後部小三角形突出，尾端圓突。體背側灰褐色，腹側灰白；胸鰭、腹鰭、尾鰭下葉及背鰭之鰭尖暗色，但成魚則為淡色。
棲所生態 :
棲息於沿岸、近海的大型鯊魚。幼鯊活動於沿岸，成魚則活動於外海，深度可達400公尺處。有季節性洄游的習性。主要以底棲或巡游性硬骨魚類、小型鯊類、6-14尾幼鯊，剛出生之幼鯊體長可達69-102公分。
地理分布 :
分布於全球各溫、熱帶水域。臺灣東部海域曾捕獲。
瀕危狀態 : IUCN 瀕危狀態:Lower Risk/near threatened
同種異名 :
Carcharhinus iranzae, Carcharhinus lamiella, Carcharhinus obscurella, Carcharias macrurus, Carcharinus iranzae, Carcharinus obscurus, Eulamia obscura, Galeolamna eblis, Galeolamna greyi, Galeolamna macrurus, Prionodon obvelatus, Squalus obscurus
Data Source : fishdb.sinica.edu.tw
Pictures
Neighbors
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