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🌊 Marine Least Concern 🌡️ Tropical

Randall's fusilier

Pterocaesio randalli Carpenter, 1987
Max Length
25 cm
Max Weight
-
Lifespan
-
Trophic Level
3.4
Depth
1–30 m
Climate
Tropical
Resilience
High
Vulnerability
26.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Ranges widely around coral reefs in school. Feeds on zooplankton in midwater aggregations. Oviparous, with numerous, small pelagic eggs . Easily recognized from a distance by the bright yellow marking . Also caught by drive-in nets.

Scientific Name
Pterocaesio randalli
Authority
Carpenter, 1987
Habitat
Marine
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
25 cm
Depth Range
1–30 m
Latitude
9°S – 15°N
Trophic Level
3.4
Resilience
High
Vulnerability
26.00/100
Migration
Non-migratory
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 10; Dorsal soft rays (total): 14 - 16; Anal spines: 3; Anal soft rays: 12. Body blue-green to reddish dorsally, lighter ventrally; above pectoral fin is a large yellow blotch of variable size, roughly rhomboid in shape, the oblique side slanting anteriorly. 4 scales on cheek; 22-27 predorsal scales; scaled dorsal and anal fins; Upper peduncular scale rows usually 11-13 (11-14); lower peduncular scale rows usually 15 or 16 (15-17). Supra-temporal band of scales confluent at dorsal midline. basioccipital with a broad, flat process for attachment of Baudelot's ligament; processes not extending much more ventrally than rim of condyle. Post maxillary with 2 processes; posterior end of maxilla tapered . Head length 3.3-3.6 in SL; body depth 3.4-4.9 in SL .: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Randall's fusilier 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; reef-associated; non-migratory; depth range 1 - 30 m . Tropical; 15°N - 9°S, 94°E - 130°E West Pacific: Laccadive Archipelago to the Philippines.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Migration
Non-migratory
Trophic Level
3.4±0.45
🐠 Schooling
Food Items

zooplankton in midwater aggregations

📐 Morphometrics

Length–Weight Relationship: W = 0.00977 × L3.1 (TL)
Max TL
25cm
Dorsal Spines
10
Dorsal Rays
15
Anal Spines
3
Anal Rays
12

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2023

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
26.00/100
Low vulnerability
Trophic Level
3.4
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Latitude Range
15°N – 9°S
Described By
Carpenter, 1987

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