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🌊 Marine Data Deficient 🌡️ Tropical

Threefinger threadfin

Eleutheronema tridactylum Bleeker, 1849
Max Length
25 cm
Max Weight
-
Lifespan
-
Trophic Level
3.6
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
21.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

Threefinger threadfin (Eleutheronema tridactylum) is a ray-finned fish of the family Polynemidae. It inhabits marine (saltwater) waters in pelagic environments. This species can reach a maximum total length of 25 cm. With a trophic level of 3.6, it is a mid-level predator. It is assessed as Data Deficient on the IUCN Red List.

Scientific Name
Eleutheronema tridactylum
Authority
Bleeker, 1849
Habitat
Marine
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
DD
Max Length
25 cm
Latitude
8°S – 14°N
Trophic Level
3.6
Resilience
High
Vulnerability
21.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 9; Dorsal soft rays (total): 13 - 14; Anal spines: 3; Anal soft rays: 14 - 15. Pectoral filaments 3; fin membranes uniformly brown like all other fins. Vomer lacks deciduous tooth plates on both sides throughout its life history. Posterior part of maxilla shallow, 2-3% of SL. Long tooth plate extension onto lateral surface of lower jaw, 9-10% SL .: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Threefinger threadfin 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; brackish; pelagic-neritic. Tropical; 14°N - 8°S, 97°E - 130°E known only from Thailand, Malaysia, and western Indonesia.

🌿 Ecology

Zone Preferences
🌊 Marine 🌿 Brackish 🐟 Pelagic
Trophic Level
3.6±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00676 × L3.09 (TL)
Max TL
25cm
Dorsal Spines
9
Dorsal Rays
14
Anal Spines
3
Anal Rays
15

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2009

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
21.00/100
Low vulnerability
Trophic Level
3.6
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Latitude Range
14°N – 8°S
Described By
Bleeker, 1849

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