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🌊 Marine Least Concern 🍽️ Edible 🎣 Game Fish ⚡ Reports of ciguatera poisoning 🌡️ Tropical

Blue trevally

Ferdauia ferdau Fabricius, 1775
Max Length
70 cm
Max Weight
8.0 kg
Lifespan
-
Trophic Level
4.3
Depth
0–60 m
Climate
Tropical
Resilience
Medium
Vulnerability
44.00/100
Typical Length
30 cm
Depth Zone
reef

📖 Overview

Adults are found in coastal waters adjacent to sandy beaches; also found to depths of 60 m, often near reefs . Pelagic . Singly or in small groups . They feed mainly on mollusks, benthic crustaceans, and occasionally on small fish that are abundant in the lagoons. Excellent food fish , the flesh is rarely poisonous. Minimum depth reported taken from Ref. 128797.

Scientific Name
Ferdauia ferdau
Authority
Fabricius, 1775
Habitat
Marine
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
70 cm
Max Weight
8 kg
Depth Range
0–60 m
Latitude
35°S – 37°N
Trophic Level
4.3
Resilience
Medium
Vulnerability
44.00/100
Salinity
30–40 ppt

🔬 Taxonomy

Genus
Ferdauia
Ferdauia
Species
Blue trevally
Ferdauia ferdau

🐟 Physical Description

Dorsal spines (total): 9; Dorsal soft rays (total): 26 - 34; Anal spines: 3; Anal soft rays: 21 - 26. : fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Blue trevally is currently being reviewed.

🦐 Diet

Diet information for Blue trevally is currently being compiled.

🥚 Reproduction

Reproduction data for Blue trevally is currently being compiled.

🌍 Habitat & Distribution

Marine; brackish; reef-associated; depth range 0 - 60 m . Tropical; 37°N - 35°S, 25°E - 127°W East Africa (to Port Elizabeth, South Africa, Ref.

🌿 Ecology

Zone Preferences
🌊 Marine 🌿 Brackish 🪸 Reef Associated
Trophic Level
4.3±0.5
Food Items

mollusks, benthic crustaceans, and occasionally on small fish (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.0138 × L2.97 (TL)
Max TL
70cm
Max Weight
8,000g
Dorsal Spines
9
Dorsal Rays
30
Anal Spines
3
Anal Rays
24

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2015

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
44.00/100
Moderate vulnerability
Trophic Level
4.3
Apex / Top predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Latitude Range
37°N – 35°S
Described By
Fabricius, 1775

🍽️ Edibility & Flavour

"Ferdauia Ferdau 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 20.3 g
Omega-3 (total) 173 mg

🔬 Mercury Safety

Mercury data for Blue trevally 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

👥 Community & Contribute

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