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🌊 Marine Least Concern 🍽️ Edible 🌡️ Tropical

Indian Ocean mimic surgeonfish

Acanthurus tristis Randall, 1993
Max Length
25 cm
Max Weight
-
Lifespan
-
Trophic Level
2.2
Depth
2–30 m
Climate
Tropical
Resilience
High
Vulnerability
25.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Occurs in shallow lagoon and seaward reefs, in areas of mixed coral, rock or sand. Juveniles mimic the cryptic Centropyge eibli .

Scientific Name
Acanthurus tristis
Authority
Randall, 1993
Habitat
Marine
Climate
Tropical
Body Shape
Short and / or deep
IUCN Status
LC
Max Length
25 cm
Depth Range
2–30 m
Latitude
9°S – 24°N
Trophic Level
2.2
Resilience
High
Vulnerability
25.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 8; Dorsal soft rays (total): 23 - 33; Anal spines: 3; Anal soft rays: 22 - 29. Margin of caudal fin narrow and white. No orange area behind gill opening and extending ventrally behind base of pectoral fins (juveniles mimic the angelfish Centropyge eibli) (Ref 9808). : short and / or deep.

🌀 Behaviour

Behavioural data for Indian Ocean mimic surgeonfish is currently being reviewed.

🦐 Diet

Diet information for Indian Ocean mimic surgeonfish is currently being compiled.

🥚 Reproduction

Reproduction data for Indian Ocean mimic surgeonfish is currently being compiled.

🌍 Habitat & Distribution

Marine; reef-associated; depth range 2 - 30 m . Tropical; 24°N - 9°S, 71°E - 116°E west to Maldives and Chagos Archipelago, and east to islands of southern Indonesia at least to Bali.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
2.2±0.1

📐 Morphometrics

Length–Weight Relationship: W = 0.02291 × L2.96 (TL)
Max TL
25cm
Dorsal Spines
8
Dorsal Rays
28
Anal Spines
3
Anal Rays
26

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2010

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
25.00/100
Low vulnerability
Trophic Level
2.2
Omnivore / Planktivore
Body Shape
Short and / or deep
Climate Zone
Tropical
Latitude Range
24°N – 9°S
Described By
Randall, 1993

🍽️ Edibility & Flavour

"Acanthurus Tristis 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 18.1 g
Omega-3 (total) 104 mg

🔬 Mercury Safety

Mercury data for Indian Ocean mimic surgeonfish 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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