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🌊 Marine Vulnerable 🌡️ Tropical

Chronixis surgeonfish

Acanthurus chronixis Randall, 1960
Max Length
28 cm
Max Weight
-
Lifespan
-
Trophic Level
2.2
Depth
0–6 m
Climate
Tropical
Resilience
High
Vulnerability
26.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Found over sand and coral bottoms of clear channels . Juveniles probably occur on reef flats . Rare and not commercial (J.E. Randall, pers. comm.).

Scientific Name
Acanthurus chronixis
Authority
Randall, 1960
Habitat
Marine
Climate
Tropical
Body Shape
Short and / or deep
IUCN Status
VU
Max Length
28 cm
Depth Range
0–6 m
Trophic Level
2.2
Resilience
High
Vulnerability
26.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 8; Dorsal soft rays (total): 26; Anal spines: 3; Anal soft rays: 24. Caudal fin lunate. Life colour unknown. Preserved specimen is dark brown with two small oval spots, one above and the other slightly behind the upper end of the gill opening, and a dark brown band at the base of the dorsal fin.: short and / or deep.

🌀 Behaviour

Behavioural data for Chronixis surgeonfish 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 0 - 6 m . Tropical; 2°N - 1°N endemic of that atoll.

🌿 Ecology

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

📐 Morphometrics

Length–Weight Relationship: W = 0.02291 × L2.96 (TL)
Max TL
28cm
Dorsal Spines
8
Dorsal Rays
26
Anal Spines
3
Anal Rays
24

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Vulnerable
Assessment Date
2010

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
26.00/100
Low vulnerability
Trophic Level
2.2
Omnivore / Planktivore
Body Shape
Short and / or deep
Climate Zone
Tropical
Described By
Randall, 1960

🦠 Common Diseases

The following diseases are known to affect Chronixis surgeonfish.

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 2 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
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View all observations for Chronixis surgeonfish ↗
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