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🌊 Marine 🌡️ Tropical

Blackfin threadfin

Polydactylus nigripinnis Munro, 1964
Max Length
20 cm
Max Weight
-
Lifespan
-
Trophic Level
3.5
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
12.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Collected off river mouths as well as offshore . Inhabits coastal waters over sand or mud bottoms . Known to be taken at 150 m in the Gulf of Carpentaria but typically from a much shallower depth .

Scientific Name
Polydactylus nigripinnis
Authority
Munro, 1964
Habitat
Marine
Climate
Tropical
Body Shape
Short and / or deep
Max Length
20 cm
Trophic Level
3.5
Resilience
High
Vulnerability
12.00/100
Salinity
30–40 ppt

🐟 Physical Description

Body uniformly golden-silver. Pectoral fin rays unbranched, blackish; tip of uppermost filament reaching to or just short of level of posterior tip of upper part of pectoral fin .: short and / or deep; Cross section: compressed.

🌀 Behaviour

Behavioural data for Blackfin 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; demersal. Tropical; 6°S - 17°S, 127°E - 147°E

🌿 Ecology

Zone Preferences
🌊 Marine 🌿 Brackish ⬇️ Benthic
Trophic Level
3.5±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.01738 × L3.05 (TL)
Max TL
20cm

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
12.00/100
Low vulnerability
Trophic Level
3.5
Predator
Body Shape
Short and / or deep
Climate Zone
Tropical
Described By
Munro, 1964

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