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🌊 Marine Least Concern 🍽️ Edible ⚠️ Venomous ⚡ Venomous 🌡️ Tropical

Blue-spotted spinefoot

Siganus corallinus Valenciennes, 1835
Max Length
35 cm
Max Weight
-
Lifespan
-
Trophic Level
2
Depth
3–30 m
Climate
Tropical
Resilience
High
Vulnerability
30.00/100
Typical Length
20 cm
Depth Zone
reef

📖 Overview

Occurs in coral-rich areas of lagoons. Juveniles found in small schools in shallow seagrass beds and reefs; often found among Acropora corals. Adults usually in pairs on shallow coral reefs and feed on benthic algae. A food fish that is occasionally poisonous .

Scientific Name
Siganus corallinus
Authority
Valenciennes, 1835
Habitat
Marine
Climate
Tropical
Body Shape
Short and / or deep
IUCN Status
LC
Max Length
35 cm
Depth Range
3–30 m
Latitude
30°S – 30°N
Trophic Level
2
Resilience
High
Vulnerability
30.00/100
Water Temp
24–27 °C
Salinity
30–40 ppt

🔬 Taxonomy

Kingdom
Animalia
Phylum
Chordata
Class
Teleostei
Teleostei
Order
Acanthuriformes
Acanthuriformes
Family
Siganidae
Siganidae
Genus
Siganus
Siganus
Species
Blue-spotted spinefoot
Siganus corallinus

🐟 Physical Description

Dorsal spines (total): 13; Dorsal soft rays (total): 10; Anal spines: 7; Anal soft rays: 9; Vertebrae: 13. Head, body and fins orange-yellow; pale blue ocelli with darker blue margins on head, thorax and sides; spots about pinhead size, larger and more crowded on head, sometimes smaller on sides; ocelli may extend onto bases of dorsal and anal fins, and on bases of outer rays of caudal fin. Very small juveniles (up to 50 mm SL) may have vertical blue lines on side, fragmenting into the ocelli with increase in size. Orbit with a diffused-edged dark, triangular smudge; orange-brown iris Fin spines stout, pungent and venomous. Midline of thorax and ridges fully scaled.: short and / or deep; Cross section: compressed.

🌀 Behaviour

Behavioural data for Blue-spotted spinefoot is currently being reviewed.

🦐 Diet

algae
aquatic plants
detritus

🥚 Reproduction

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

🌍 Habitat & Distribution

Marine; reef-associated; depth range 3 - 30 m , usually 5 - 30 m . Tropical; 24°C - 27°C ; 30°N - 30°S, 49°E - 170°E West Pacific: Aldabra Islands, Seychelles, Maldives, Andaman Sea, Thailand, Indonesia, Peninsular Malaysia, Sabah, Singapore, Viet Nam, Philippines, Ryukyu Islands, Ogasawara Islands, Palau, ?Kiribati, Papua New Guinea, Solomon Islands, Australia, Vanuatu, and New Caledonia.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
2
🐠 Schooling
Food Items

benthic algae

📐 Morphometrics

Length–Weight Relationship: W = 0.01175 × L3.1 (TL)
Max TL
35cm
Dorsal Spines
13
Dorsal Rays
10
Anal Spines
7
Anal Rays
9
Vertebrae
13

🌡️ Water Parameters & Tolerance

Temperature Range
24–27°C
Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2015

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
30.00/100
Low vulnerability
Trophic Level
2
Omnivore / Planktivore
Body Shape
Short and / or deep
Climate Zone
Tropical
Latitude Range
30°N – 30°S
Described By
Valenciennes, 1835

⚠️ 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

🍽️ Edibility & Flavour

"Blue-spotted spinefoot 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 18.5 g
Omega-3 (total) 100 mg

🔬 Mercury Safety

Mercury data for Blue-spotted spinefoot 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
✓ Sustainable Choice

🔬 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
- - -

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 16 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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