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Diadromous Least Concern 🌡️ Tropical

Snakehead gudgeon

Giuris margaritaceus Valenciennes, 1837
Max Length
31.2 cm
Max Weight
-
Lifespan
-
Trophic Level
2.6
Depth
0–5 m
Climate
Tropical
Resilience
High
Vulnerability
36.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Adults occur in fresh water, estuaries and inshore . Found in a variety of habitats including rivers, swamps, coastal streams and floodplains over mud bottoms, often among dense aquatic vegetation or the cover of undercut banks. They feed mainly on aquatic insects and nymphs, but also takes lesser amount of algae, other aquatic plants and small crustaceans. Pelagic larval stage is found in marine water, but adults are always found in freshwater .

Scientific Name
Giuris margaritaceus
Authority
Valenciennes, 1837
Habitat
Diadromous
Climate
Tropical
Body Shape
Elongated
IUCN Status
LC
Max Length
31.2 cm
Depth Range
0–5 m
Latitude
25°S – 18°N
Trophic Level
2.6
Resilience
High
Vulnerability
36.00/100
Migration
Amphidromous
Water Temp
20–30 °C
Salinity
30–40 ppt

🔬 Taxonomy

Genus
Giuris
Giuris
Species
Snakehead gudgeon
Giuris margaritaceus

🐟 Physical Description

Dorsal spines (total): 7; Dorsal soft rays (total): 8 - 9; Anal spines: 1; Anal soft rays: 9. Body relatively large, stout and cylindrical with a dorsally flattened head; generally greenish brown with 8-10 dark bars across sides and large black blotch at base of pectoral fins; lower half of head tan or yellowish with 3-4 dark brown to reddish stripes radiating from lower part of eye .: elongated.

🌀 Behaviour

Behavioural data for Snakehead gudgeon is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

Plant spawner.

🌍 Habitat & Distribution

Marine; freshwater; brackish; demersal; amphidromous ; depth range 0 - 5 m . Tropical; 20°C - 30°C ; 18°N - 25°S

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater 🌿 Brackish ⬇️ Benthic
Migration
Amphidromous
Trophic Level
2.6±0.2
Food Items

aquatic insects and nymphs, but also takes lesser amount of algae, other aquatic plants and small cr

📐 Morphometrics

Length–Weight Relationship: W = 0.00724 × L3.16 (TL)
Max TL
31.2cm
Dorsal Spines
7
Dorsal Rays
9
Anal Spines
1
Anal Rays
9

🌡️ Water Parameters & Tolerance

Temperature Range
20–30°C
Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2024

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
36.00/100
Moderate vulnerability
Trophic Level
2.6
Omnivore / Planktivore
Body Shape
Elongated
Climate Zone
Tropical
Latitude Range
18°N – 25°S
Described By
Valenciennes, 1837

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