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🌊 Marine Endangered 🍽️ Edible ⚠️ Venomous ⚡ Traumatogenic 🌡️ Tropical

Sicklefin lemon shark

Negaprion acutidens Rüppell, 1837
Max Length
380 cm
Max Weight
Lifespan
Trophic Level
4.1
Depth
0–92 m
Climate
Tropical
Resilience
Very low
Vulnerability
78.00/100
Typical Length
Depth Zone
reef

📖 Overview

Adults are found on continental and insular shelves and terraces . And are common on coral reefs . Juveniles are confined to shallow inshore areas, with preference for sandy lagoons and turbid, mangrove swamps. Adults feed on smaller sharks, stingrays and on benthic bony fishes . Viviparous . Dangerous if provoked . 1 to 11 of 45 cm young are born per litter . Meat is utilized fresh and dried salted for human consumption, fins for shark-fin soup base, and liver oil for vitamins .

Scientific Name
Negaprion acutidens
Authority
Rüppell, 1837
Habitat
Marine
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
EN
Max Length
380 cm
Depth Range
0–92 m
Latitude
32°S – 30°N
Trophic Level
4.1
Resilience
Very low
Vulnerability
78.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 0; Anal spines: 0. A large, stocky, yellowish shark with a broad, blunt snout, narrow, smooth-cusped teeth in both jaws, and equal-sized dorsal fins . Yellowish brown above, paler below . With two nearly equally large dorsal fins .: fusiform / normal.

🌀 Behaviour

Behavioural data for Sicklefin lemon shark is currently being reviewed.

🦐 Diet

Diet information for Sicklefin lemon shark is currently being compiled.

🥚 Reproduction

🐣 Viviparous 🤰 Viviparous
Size at Maturity
230cm TL

Viviparous, placental , 1-14 per litter . Gestation period 10-11 months. Size at birth about 50 to 70 cm TL ; 45-80 cm TL. Distinct pairing with embrace . Mating and pupping take place during late spring and early summer .

🌍 Habitat & Distribution

Marine; brackish; reef-associated; oceano-estuarine ; depth range 0 - 92 m . Tropical; 30°N - 32°S, 32°E - 140°W South Africa (including Mauritius, Seychelles, Madagascar) to Philippines, north to Viet Nam, south to Australia.

🌿 Ecology

Zone Preferences
🌊 Marine 🌿 Brackish 🪸 Reef Associated
Trophic Level
4.1±0.6
Food Items

smaller sharks, stingrays and on benthic bony fishes (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.0049 × L3.08 (TL)
Max TL
380cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Endangered
Assessment Date
2020

📊 Population Risk & Fisheries

Population Resilience
Very low
Minimum doubling time
Fishing Vulnerability
78.00/100
Very High vulnerability
Trophic Level
4.1
Apex / Top predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Latitude Range
30°N – 32°S
Described By
Rüppell, 1837

🍽️ Edibility & Flavour

"Sicklefin lemon shark 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

Per 100g cooked — Source: USDA FoodData Central

Nutrient Amount
Protein 21.8 g
Omega-3 (total) 97 mg

🔬 Mercury Safety

Mercury data for Sicklefin lemon shark 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

🗺️ 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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