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🌊 Marine Least Concern 🌡️ Tropical

Gold-specs jawfish

Opistognathus randalli Vaniz, 2009
Max Length
10.4 cm
Max Weight
-
Lifespan
-
Trophic Level
3.5
Depth
5–32 m
Climate
Tropical
Resilience
-
Vulnerability
10.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

Males of this species are strongly territorial and frequently engage in jaw locking combat, apparently to evict rivals or confiscate their burrows . Found in sand/rubble bottoms near reefs in about 5-30 m (Ref 90102).

Scientific Name
Opistognathus randalli
Authority
Vaniz, 2009
Habitat
Marine
Climate
Tropical
Body Shape
Elongated
IUCN Status
LC
Max Length
10.4 cm
Depth Range
5–32 m
Trophic Level
3.5
Vulnerability
10.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 11; Dorsal soft rays (total): 14 - 16; Anal spines: 3; Anal soft rays: 14 - 15; Vertebrae: 28. This species is distinguished by the following characters: elongate supramaxilla and posterior end of maxilla produced as a thin flexible lamina; a single conspicuous black stripe at inner lining of upper jaw and adjacent membranes; dorsal, anal and caudal fins with narrow, pale (blue in life) distal margins; when alive, dorsal portion of iris golden; lateral-line terminus below verticals between segmented dorsal-fin rays 1 to 4, typically below second to third ray; caudal vertebrae 18 .: elongated; Cross section: oval.

🌀 Behaviour

Behavioural data for Gold-specs jawfish 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-neritic; depth range 5 - 32 m . Tropical

🌿 Ecology

Zone Preferences
🌊 Marine 🐟 Pelagic
Trophic Level
3.5±0.6

📐 Morphometrics

Length–Weight Relationship: W = 0.00389 × L3.12 (TL)
Max TL
10.4cm
Dorsal Spines
11
Dorsal Rays
15
Anal Spines
3
Anal Rays
15
Vertebrae
28

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2023

📊 Population Risk & Fisheries

Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.5
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Vaniz, 2009

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