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🌊 Marine Endangered 🍽️ Edible ⚠️ Venomous ⚡ Traumatogenic 🌡️ Tropical

Mangrove whipray

Urogymnus granulatus Macleay, 1883
Max Length
-
Max Weight
-
Lifespan
-
Trophic Level
4.1
Depth
1–85 m
Climate
Tropical
Resilience
Low
Vulnerability
86.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Found in mangrove areas, also over sand or sand and rubble in lagoons near reefs to depth of 85 m on the continental shelf . Feeds on small fishes, bottom dwelling crustaceans, and large infauna . Ovoviviparous , with histotrophy. Caught regularly, but in low numbers, by demersal tangle net and bottom trawl fisheries. Utilized for its meat, skin (high value) and cartilage.

Scientific Name
Urogymnus granulatus
Authority
Macleay, 1883
Habitat
Marine
Climate
Tropical
Body Shape
Other
IUCN Status
EN
Depth Range
1–85 m
Latitude
28°S – 26°N
Trophic Level
4.1
Resilience
Low
Vulnerability
86.00/100
Salinity
30–40 ppt

🐟 Physical Description

Has white spots and a white tail.: other.

🌀 Behaviour

Behavioural data for Mangrove whipray is currently being reviewed.

🦐 Diet

small fish
crustaceans
cephalopods

🥚 Reproduction

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

Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures . Distinct pairing with embrace . Fully developed young, size at birth 28 cm.

🌍 Habitat & Distribution

Marine; brackish; reef-associated; depth range 1 - 85 m . Tropical; 26°N - 28°S, 44°E - 163°E West Pacific: Red Sea to Oceania, distribution considered patchy but probably widespread.

🌿 Ecology

Zone Preferences
🌊 Marine 🌿 Brackish 🪸 Reef Associated
Trophic Level
4.1±0.64
Food Items

small fishes, bottom dwelling crustaceans, and large infauna (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.01023 × L3.06 (TL)

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Endangered
Assessment Date
2023

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
86.00/100
Very High vulnerability
Trophic Level
4.1
Apex / Top predator
Body Shape
Other
Climate Zone
Tropical
Latitude Range
26°N – 28°S
Described By
Macleay, 1883

⚠️ Venom Profile

Medical Warning: This species is venomous. Seek immediate medical attention if envenomated. Contact emergency services and follow first aid guidance below.
Venom Type
proteinaceous cytotoxic
Delivery
serrated caudal spine (barb)
Potency
Severe
Mortality Risk
Low
Symptom Onset
5min
Duration
24.0hrs
Antivenom
✗ Not Available
Named Toxins
phosphodiesterase 5-nucleotidase cardiotoxin peptides
Symptoms
  • intense pain
  • laceration
  • oedema
  • retained spine fragments possible
Affected Body Systems
cardiovascular muscular
First Aid
Hot water immersion. Do not remove embedded barb from chest or abdomen - medical removal only.
Medical Treatment

Wound care, imaging for retained spine, tetanus prophylaxis, antibiotic prophylaxis for marine wounds.

References: Compiled from Bhide (2018), Halstead et al. (1988) and family-specific envenomation literature

🍽️ Edibility & Flavour

⚡ Nutrition

Detailed nutritional data for Mangrove whipray is currently being compiled from USDA FoodData Central.

🔬 Mercury Safety

Mercury data for Mangrove whipray 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

🔬 Full Nutritional Profile

Per 100g - Raw, per 100g - Source: USDA FoodData Central templates (generic fish average)

Proximate Composition
Energy125 kcal
Moisture75 %
Protein20 %
Total Fat4 %
Ash1.3 %
Fatty Acids (g)
Saturated Fat1 g
Monounsaturated Fat1.2 g
Polyunsaturated Fat1.5 g
Omega-3 Total1 g
EPA0.3 g
DHA0.5 g
Omega-6 Total0.3 g
Key Minerals & Vitamins
Calcium20 mg
Iron0.7 mg
Magnesium30 mg
Phosphorus220 mg
Potassium380 mg
Sodium55 mg
Zinc0.5 mg
Selenium32 µg
Vitamin B122 µg

📊 Population Dynamics

Year Region Index Notes
- - -

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