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🌊 Marine 🌡️ Tropical

Arabian blackspot threadfin

Polydactylus mullani Hora, 1926
Max Length
22.2 cm
Max Weight
-
Lifespan
-
Trophic Level
3.9
Depth
14–115 m
Climate
Tropical
Resilience
High
Vulnerability
24.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

Arabian blackspot threadfin (Polydactylus mullani), first described by Hora, 1926 is a medium-sized fish in the family Polynemidae (order Perciformes). Adults typically reach 22.20 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 14 to 115 metres. It occurs in Tropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator.

Scientific Name
Polydactylus mullani
Authority
Hora, 1926
Habitat
Marine
Climate
Tropical
Max Length
22.2 cm
Depth Range
14–115 m
Latitude
15°S – 26°N
Trophic Level
3.9
Resilience
High
Vulnerability
24.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 9; Dorsal soft rays (total): 12 - 13; Anal spines: 3; Anal soft rays: 11 - 12; Vertebrae: 24. With 7 pectoral filaments; uppermost extending well beyond posterior tip of pectoral fin. Pectoral fin rays 19-22% of SL; all rays branched except uppermost 1 or 2. Well-developed swim bladder. A large black spot anteriorly on lateral line .

🌀 Behaviour

Behavioural data for Arabian blackspot 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; pelagic-oceanic; depth range 14 - 115 m . Tropical; 26°N - 15°S, 59°E - 74°E Indian Ocean: Arabian Sea.

🌿 Ecology

Zone Preferences
🌊 Marine 🐟 Pelagic
Trophic Level
3.9±0.66
Food Items

shrimps and small fishes (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.00724 × L3.06 (TL)
Max TL
22.2cm
Dorsal Spines
9
Dorsal Rays
13
Anal Spines
3
Anal Rays
12
Vertebrae
24

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
24.00/100
Low vulnerability
Trophic Level
3.9
Predator
Climate Zone
Tropical
Latitude Range
26°N – 15°S
Described By
Hora, 1926

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