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🌊 Marine Least Concern 🐠 Aquarium 🌡️ Tropical

Gnatholepis Argus

Gnatholepis argus Larson & Buckle, 2005
Max Length
3 cm
Max Weight
-
Lifespan
-
Trophic Level
3.2
Depth
0–1 m
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Collected from shallow intertidal pools that are not deeper than 1 m, on rocky fringing reefs where there are low corals, especially faviids and sponges; sand to muddy substrate with surrounding waters turbid .

Scientific Name
Gnatholepis argus
Authority
Larson & Buckle, 2005
Habitat
Marine
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
3 cm
Depth Range
0–1 m
Trophic Level
3.2
Resilience
High
Vulnerability
10.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 6 - 7; Dorsal soft rays (total): 9 - 11; Anal spines: 1; Anal soft rays: 11; Vertebrae: 26. Distinguished by the following characteristics: lacking scales on side of head, predorsal midline and pectoral fin base, no distinct flap on end of lower lip (low fold may be present), and no distinct canine or enlarged teeth; sexually dimorphic in adult size and colour, with females averaging larger than males; sexually dichromatic: males with row of six dusky to blackish spots or blotches along mid-side of body, posteriormost 3-4 blackish spots darker and larger than anterior spots and surrounded by small iridescent blue spots in life, small dense black spots scattered on unpaired fins; females with broken grey line along midside of body and dusky to blackish spots or blotches indistinct and posterior blotches not darker than anterior ones, no small iridescent blue spots on body; second dorsal fin rays modally I,10; anal fin rays modally I,11; pectoral rays 15-18; lateral scales 24-28; predorsal scales absent from nape midline, scales on side of head may reach from just over opercle to nearly behind eyes .: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Gnatholepis Argus is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

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

🌍 Habitat & Distribution

Marine; reef-associated; depth range 0 - 1 m . Tropical Indian Ocean: Australia.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3.2±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.01 × L3 (TL)
Max TL
3cm
Dorsal Spines
7
Dorsal Rays
10
Anal Spines
1
Anal Rays
11
Vertebrae
26

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2024

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.2
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Larson & Buckle, 2005

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