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💧 Freshwater Least Concern 🌡️ Tropical

Mekong delta dragonet

Tonlesapia amnica Ng & Rainboth, 2011
Max Length
3.8 cm
Max Weight
Lifespan
Trophic Level
3.1
Depth
Climate
Tropical
Resilience
Vulnerability
10.00/100
Typical Length
Depth Zone
demersal

📖 Overview

The Song Hau Giang which is a branch of the Mekong River also known as the Bassac River is fairly clear, slow flowing (current about 0.2 ms-1) and wide (2 km) with a sand and silt bottom. This species has also been collected from brackish habitats and is the third species of Indo-Pacific callionymid known to inhabit freshwaters (the other species being Callionymus fluviatilis and T. tsukawakii) .

Scientific Name
Tonlesapia amnica
Authority
Ng & Rainboth, 2011
Habitat
Freshwater
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
3.8 cm
Trophic Level
3.1
Vulnerability
10.00/100
Salinity
0–0.5 ppt

🔬 Taxonomy

Genus
Tonlesapia
Tonlesapia
Species
Mekong delta dragonet
Tonlesapia amnica

🐟 Physical Description

Tonlesapia amnica differs from its only congener, T. tsukawakii, in having the infraorbital canal extending beyond (vs. not reaching) ventral margin of orbit, a more slender body (7.2–13.5% SL vs. 14.3–15.0) and caudal peduncle (4.4–5.2% SL vs. 5.1–6.3), a smaller eye (6.5–8.3% SL vs. 8.7–9.2) and more dorsal-fin rays (9–10 vs. 8) .: fusiform / normal.

🌀 Behaviour

Behavioural data for Mekong delta dragonet is currently being reviewed.

🦐 Diet

Diet information for Mekong delta dragonet is currently being compiled.

🥚 Reproduction

Reproduction data for Mekong delta dragonet is currently being compiled.

🌍 Habitat & Distribution

Freshwater; demersal. Tropical; 11°N - 10°N, 105°E - 106°E

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Trophic Level
3.1±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00955 × L2.95 (TL)
Max TL
3.8cm

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2012

📊 Population Risk & Fisheries

Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.1
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Ng & Rainboth, 2011

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