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🌊 Marine Endangered 🍽️ Edible 🌡️ Subtropical

Japanese topeshark

Hemitriakis japanica Müller & Henle, 1839
Max Length
110 cm
Max Weight
-
Lifespan
15 yrs
Trophic Level
4.4
Depth
20–345 m
Climate
Subtropical
Resilience
Very low
Vulnerability
58.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Occurs close inshore and offshore down to at least 100 m depth. Presumably feeds on small fishes, cephalopods and crustaceans. Ovoviviparous, with 8 to 22 young in a litter. Size at birth about 20 to 21 cm. Utilized for human consumption.

Scientific Name
Hemitriakis japanica
Authority
Müller & Henle, 1839
Habitat
Marine
Climate
Subtropical
IUCN Status
EN
Max Length
110 cm
Lifespan
15 years
Depth Range
20–345 m
Trophic Level
4.4
Resilience
Very low
Vulnerability
58.00/100
Salinity
30–40 ppt

🐟 Physical Description

Physical description for Japanese topeshark is currently being compiled.

🌀 Behaviour

Behavioural data for Japanese topeshark is currently being reviewed.

🦐 Diet

Diet information for Japanese topeshark is currently being compiled.

🥚 Reproduction

🐣 Ovoviviparous
Size at Maturity
91.5cm TL

Ovoviviparous, embryos feed solely on yolk .

🌍 Habitat & Distribution

Marine; demersal; depth range 20 - 345 m . Subtropical; 40°N - 19°N, 112°E - 141°E Northwest Pacific: China, Taiwan, Korea, and Japan.

🌿 Ecology

Zone Preferences
🌊 Marine ⬇️ Benthic
Trophic Level
4.4±0.4
Food Items

small fishes, cephalopods and crustaceans

📐 Morphometrics

Length–Weight Relationship: W = 0.00437 × L3.04 (TL)
Max TL
110cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Endangered
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Very low
Minimum doubling time
Fishing Vulnerability
58.00/100
High vulnerability
Trophic Level
4.4
Apex / Top predator
Climate Zone
Subtropical
Described By
Müller & Henle, 1839

🍽️ Edibility & Flavour

"Japanese topeshark is an edible species."

✗ Not for Raw
✓ Fresh Indicators
  • Clear, bright eyes — cloudy eyes indicate age
  • Firm flesh that springs back when pressed
  • Fresh ocean smell, never strong or ammonia-like
  • Bright red or pink gills, not grey or brown
  • Shiny, moist skin with scales tightly attached
✗ Avoid If
  • Cloudy or sunken eyes
  • Strong fishy or ammonia odour
  • Soft, mushy flesh that doesn't spring back
  • Discoloured or dry flesh
Best Cooking Methods
Baking Grilling Pan-frying

Nutrition

Detailed nutritional data for Japanese topeshark is currently being compiled from USDA FoodData Central.

🔬 Mercury Safety

Mercury data for Japanese topeshark has not yet been assigned. Please consult FDA/EPA guidance for general seafood safety advice.

🌿 Sustainability

Best Choice
Healthy stocks, low impact
Good Alternative
Well-managed, minor concerns
Use Caution
Check sourcing and season
Avoid
Overfished or high impact

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Japanese topeshark
🌍CES psohlav japonský
🇩🇪German Japanischer Hundshai
🇫🇮Finnish japaninkoirahai
🇫🇷French Requin-há Dochizame
🇯🇵Japanese Eirakubuka · エイラクブカ
🇳🇱Dutch Japanse vaalhaai
🇵🇹Portuguese Tubarão-focinho-liso
🇷🇺Russian Японская суповая акула
🇪🇸Spanish Cazón Japonés
🇨🇳Chinese 日本半皺唇鯊 · 日本半皺唇鯊(日本翅鯊 · 日本灰鮫 · 日本翅沙 · 日本翅鯊 · 沙條 · 白鯊仔 · 胎沙 · 赤匏仔

Scientific Synonyms

Scientific Name Author Year Status
? japonica Müller & Henle 1839 Synonym
Galeorhinus japonicus Müller & Henle 1839 Synonym
Galeus japanicus Müller & Henle 1839 Synonym
Hemitriakis japonica Müller & Henle 1839 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 2 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
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