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🌊 Marine Least Concern ⚠️ Venomous ⚡ Traumatogenic 🌡️ Tropical

Whitemargin stargazer

Uranoscopus sulphureus Valenciennes, 1832
Max Length
45 cm
Max Weight
-
Lifespan
-
Trophic Level
4.1
Depth
5–350 m
Climate
Tropical
Resilience
Medium
Vulnerability
38.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Inhabits reef flats and coastal bottoms but is rarely seen because it lies buried in sand or mud most of the time, with only the eyes showing. When buried, the cirri on the edge of the mouth serve to keep out the sand during respiration. The oral lure is used to attract the prey within striking range of the mouth. The shoulder has a venomous cleithral spine; wounds can be serious.

Scientific Name
Uranoscopus sulphureus
Authority
Valenciennes, 1832
Habitat
Marine
Climate
Tropical
Body Shape
Elongated
IUCN Status
LC
Max Length
45 cm
Depth Range
5–350 m
Trophic Level
4.1
Resilience
Medium
Vulnerability
38.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 4; Dorsal soft rays (total): 12 - 13; Anal spines: 13. Recognized by the black first dorsal fin . Body with distinctive black spots. Respiratory valve inside lower jaw with a thread-like brownish appendage and several long filaments around is base. Upper edge of opercle ascending backward. Posterior nostril a slit-like pore or with a very low tubular valve. First dorsal fin with V spines (last one rudimentary). Only 1 basipterygial process. No cirrus on eye (Ref 42788).: elongated.

🌀 Behaviour

Behavioural data for Whitemargin stargazer 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; reef-associated; depth range 5 - 350 m . Tropical recorded from Reunion (Ref.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
4.1±0.7

📐 Morphometrics

Length–Weight Relationship: W = 0.00794 × L3.09 (TL)
Max TL
45cm
Dorsal Spines
4
Dorsal Rays
13
Anal Spines
13

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2023

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
38.00/100
Moderate vulnerability
Trophic Level
4.1
Apex / Top predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Valenciennes, 1832

⚠️ 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 neurotoxin
Delivery
dorsal, anal, and pelvic fin spines
Potency
Severe
Mortality Risk
Low
Symptom Onset
5min
Duration
24.0hrs
Antivenom
✗ Not Available
Named Toxins
high-molecular-weight protein (Stonustoxin analogue) acetylcholine
Symptoms
  • immediate intense pain
  • swelling
  • erythema
  • occasional nausea and weakness
Affected Body Systems
peripheral nervous system cardiovascular
First Aid
Immerse affected area in hot water (45 C, tolerable) for 30-90 minutes to denature toxin. Do not apply ice.
Medical Treatment

Analgesia; wound care; tetanus prophylaxis; severe cases may require monitoring for systemic effects.

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

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