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💧 Freshwater Endangered 🌡️ Tropical

Slender rainbowfish

Melanotaenia gracilis Allen, 1978
Max Length
7.5 cm
Max Weight
Lifespan
Trophic Level
3
Depth
Climate
Tropical
Resilience
Medium
Vulnerability
33.00/100
Typical Length
Depth Zone

📖 Overview

Inhabits large water courses and isolated rocky pools generally bordered with paperbark trees (Melaleuca) which have clear waters and minimal flow during the dry season . Large numbers congregate in shady pools around log snags and submerged branches . Feeds on insects and their larvae, small crustaceans and algae. Sympatric with M. splendida australis . Prefers the following aquarium conditions: pH=7, H=10, 24°C water temperature; is an egg layer and a peaceful community fish .

Scientific Name
Melanotaenia gracilis
Authority
Allen, 1978
Habitat
Freshwater
Climate
Tropical
IUCN Status
EN
Max Length
7.5 cm
Trophic Level
3
Resilience
Medium
Vulnerability
33.00/100
Water Temp
22–28 °C
Salinity
0–0.5 ppt

🔬 Taxonomy

🐟 Physical Description

Physical description for Slender rainbowfish is currently being compiled.

🌀 Behaviour

Behavioural data for Slender rainbowfish is currently being reviewed.

🦐 Diet

Diet information for Slender rainbowfish is currently being compiled.

🥚 Reproduction

Distinct pairing .

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical; 22°C - 28°C ; 13°S - 16°S southwest of Darwin.

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
3±0.37
Food Items

insects and their larvae, small crustaceans and algae

📐 Morphometrics

Length–Weight Relationship: W = 0.01122 × L3.04 (TL)
Max TL
7.5cm

🌡️ Water Parameters & Tolerance

Temperature Range
22–28°C
Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Endangered
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
33.00/100
Low vulnerability
Trophic Level
3
Predator
Climate Zone
Tropical
Described By
Allen, 1978

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Slender Rainbowfish
🌍CES duhovka drobná
🇩🇪German Schlanker Regenbogenfisch

🗺️ 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 Slender rainbowfish ↗
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