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🌊 Marine Vulnerable 🌡️ Temperate

Hemitriakis Complicofasciata

Hemitriakis complicofasciata Takahashi & Nakaya, 2004
Max Length
81 cm
Max Weight
-
Lifespan
-
Trophic Level
4.2
Depth
-
Climate
Temperate
Resilience
Low
Vulnerability
48.00/100
Typical Length
-
Depth Zone
-

📖 Overview

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 .

Scientific Name
Hemitriakis complicofasciata
Authority
Takahashi & Nakaya, 2004
Habitat
Marine
Climate
Temperate
Body Shape
Elongated
IUCN Status
VU
Max Length
81 cm
Trophic Level
4.2
Resilience
Low
Vulnerability
48.00/100
Salinity
30–40 ppt

🐟 Physical Description

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 .: elongated.

🌀 Behaviour

Behavioural data for Hemitriakis Complicofasciata is currently being reviewed.

🦐 Diet

small fish
crustaceans
cephalopods

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

🌍 Habitat & Distribution

Marine; benthopelagic. Temperate Northwest Pacific: Ryukyu Is.

🌿 Ecology

Zone Preferences
🌊 Marine
Trophic Level
4.2±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.00437 × L3.04 (TL)
Max TL
81cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Vulnerable
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
48.00/100
Moderate-High vulnerability
Trophic Level
4.2
Apex / Top predator
Body Shape
Elongated
Climate Zone
Temperate
Described By
Takahashi & Nakaya, 2004

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