Names
Scientific Name：Carcharhinus falciformis
ZH Common Names：镰状真鲨,平滑白眼鲛,丝鲨
EN Common Names：Silky shark
Classification
Chordata > Cartilaginous fish > Sharks > Whaler sharks > Requiem sharks > Carcharhinus
Descriptions
学名、命名者与年份 : Carcharhinus falciformis (Müller & Henle, 1839)
棲息深度 : 0 - 500
最大體長 : 350 cm
简介 :
俗名大沙、平滑白眼鮫、鯊條(澎湖)、圓(澎湖)、黑鯊。棲息於大洋、深海、礁區、0-500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、北部、350 cm，模式種產於古巴。
形態特徵 :
體呈紡錘型，軀幹較修長。2個，背鰭間明顯存在隆脊，第一背鰭中大，起點於胸鰭內角的後方，後緣凹入，下角尖突；第二背鰭小，起點稍後於臀鰭起點，後緣微凹，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，尾端鈍尖。體背側暗灰色、灰褐色或藍灰色，腹側灰白；各鰭與體同色。
棲所生態 :
主要棲息於大陸棚或島嶼斜坡緣以及開放水域，亦常被發現於深海，偶可發現於沿海的大型鯊類。善游，移動速度快；通常獨游，但會與鮪魚類集結成群。主要以魚類、烏賊及大洋性蟹類為食。性兇猛，對人類有潛在性的危險。胎生，一胎可產下2-14尾幼鯊，剛出生之幼鯊體長可達57-87公分。
地理分布 :
分布於全球各溫、熱帶水域。臺灣東北及東部海域可見其蹤跡。
瀕危狀態 : IUCN 瀕危狀態:Lower Risk/least concern
同種異名 :
Aprionodon sitankaiensis, Carcharhinus atrodorsus, Carcharhinus falciformes, Carcharhinus floridanus, Carcharhinus menisorrah, Carcharhinus menissorrah, Carcharias falciformis, Carcharias falcipinnis, Carcharias menisorrah, Carcharins menisorrah, Carcharius falcipinnis, Carcharius menisorrah, Eulamia malpeloensis
Data Source : fishdb.sinica.edu.tw
Neighbors
Blacknose shark
Carcharhinus acronotus
Silvertip shark
Carcharhinus albimarginatus
Carcharhinus altimus
Carcharhinus altimus
Carcharhinus amblyrhynchoides
Carcharhinus amblyrhynchoides
Grey reef shark
Carcharhinus amblyrhynchos
Pigeye shark
Carcharhinus amboinensis
Carcharhinus borneensis
Carcharhinus borneensis
Carcharhinus brachyurus
Carcharhinus brachyurus
Spinner shark
Carcharhinus brevipinna
Carcharhinus caquetius
Carcharhinus caquetius
Carcharhinus cautus
Carcharhinus cautus
Carcharhinus coatesi
Carcharhinus coatesi
Whitecheek Shark
Carcharhinus dussumieri
Carcharhinus fitzroyensis
Carcharhinus fitzroyensis
Galapagos shark
Carcharhinus galapagensis
Pondicherry shark
Carcharhinus hemiodon
Human’s whaler shark
Carcharhinus humani
Finetooth shark
Carcharhinus isodon
Carcharhinus leiodon
Carcharhinus leiodon
Bull shark
Carcharhinus leucas
Blacktip shark
Carcharhinus limbatus
Oceanic whitetip shark
Carcharhinus longimanus
Hardnose shark
Carcharhinus macloti
Carcharhinus macrops
Carcharhinus macrops
Blacktip reef shark
Carcharhinus melanopterus
Dusky shark
Carcharhinus obscurus
Lost Shark
Carcharhinus obsolerus
Caribbean reef shark
Carcharhinus perezii
Sandbar shark
Carcharhinus plumbeus
Smalltail shark
Carcharhinus porosus
Carcharhinus sealei
Carcharhinus sealei
Carcharhinus signatus
Carcharhinus signatus
Spottail shark
Carcharhinus sorrah
Carcharhinus tilstoni
Carcharhinus tilstoni
Carcharhinus tjutjot
Carcharhinus tjutjot
Carcharhinus wheeleri
Carcharhinus wheeleri