Ocellate Topeshark

This species is distinguished by the following characters: monospondylous vertebrae 46-52; precaudal total vertebrae 124-131; posterior nasal flap developed; first dorsal fin origin anterior to free rear tips of pectoral fin; snout length short with snout tip to oral length < 1.8 times internarial width; embryos and juveniles with dark complicated lines and rings; no accessory cartilage at symphysial part of upper jaw (Ref. 55581).

Claspers of most males are almost fully elongate and calcified at about 76 cm TL; while females are mature and pregnant at about 76 cm TL. Embryos less than 22 cm TL with only external yolk, most that are more than 22 cm TL with substantial internal yolk. Litter size from 5-8 with 2-4 embryos per uterus. Five pregnant specimens contained a total of 29 embryos (9 females and 20 males) and each embryo were covered separately by embryonic membrane (Ref. 55581).

分布於西北太平洋區，由南西伯利亞至台灣。臺灣多分布於西南及東北部海域。

主要以底拖網或延繩釣捕獲。肉質不佳，一般皆以下雜魚處理。

Takahashi & Nakaya (2004)描述本種時曾檢視一尾採自台灣西南海域之胚胎仔魚。身體細長，身體橫截面形狀為圓形至垂直橢圓形。第二背鰭起點稍前於臀鰭起點。第一背鰭插入點與第二背鰭間的距離為上尾鰭邊緣之1.3 (1.1－1.4)倍。胸鰭插入點到腹鰭起點之距離為第一背鰭基部的2.2 (1.9－2.2)倍。腹鰭插入點到腹鰭起點的距離為臀鰭插入點到下尾鰭起點距離的1.8 (1.5－1.8)倍。臀鰭插入點到下尾鰭起點距離為胸鰭插入點到第一背鰭起點距離之2.6 (2.3－3.6)倍。下尾起源稍前於上尾起源。臀鰭插入點到下尾鰭起點距離為第一背鰭基部之1.0 (0.8－1.1)倍。頭部側邊輪廓稍微凸起，吻端均勻圓形。吻到口距離為吻寬之1.1 (1.0–1.1)倍鼻間距的1.7 (1.6–1.8)倍。鼻和口的距離為上唇褶長之0.8 (0.8–0.9)倍，鼻間距為上唇褶長之1.7 (1.6–1.9)倍。身體兩側和背面呈灰褐色，腹面灰白色。吻部周圍無條紋(有些成魚和稚魚有模糊黯淡的條紋)。(陳柔蓉、林沛立2012/11編寫)

棲息於大陸棚或島嶼棚的底棲性魚類，經常出現於河口區域或港灣淺水域，特別是有底藻覆蓋的砂泥地，能忍受低鹽度。主要以小魚及甲殼類為食。

The ocellate topeshark (Hemitriakis complicofasciata) is a species of houndshark, belonging to the family Triakidae. It is found in the western Pacific from the Ryukyu Islands to the Philippines and Taiwan.