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🌊 Marine 🌡️ Tropical

Australian slender bigeye

Priacanthus gracilis Hashimoto & Motomura, 2024
Max Length
22.9 cm
Max Weight
-
Lifespan
-
Trophic Level
4
Depth
32–375 m
Climate
Tropical
Resilience
High
Vulnerability
21.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Australian slender bigeye (Priacanthus gracilis) is a ray-finned fish of the family Priacanthidae. It inhabits marine (saltwater) waters in reef-associated environments. This species can reach a maximum total length of 22.9 cm. It occurs at depths between 32 and 375 metres. With a trophic level of 4, it is a mid-level predator.

Scientific Name
Priacanthus gracilis
Authority
Hashimoto & Motomura, 2024
Habitat
Marine
Climate
Tropical
Body Shape
Fusiform / normal
Max Length
22.9 cm
Depth Range
32–375 m
Trophic Level
4
Resilience
High
Vulnerability
21.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 10; Dorsal soft rays (total): 12 - 14; Anal spines: 3; Anal soft rays: 13 - 14. This species is distinguished from its congeners by the following set of characters: D 12-14 (modally 13); A soft rays 13 or 14 (14); scale rows above lateral line 9-12 (11); gill rakers on lower limb 23-25 (23); body relatively low, its depth at sixth dorsal-fin spine base 29.5-36.0% (mean 32.7%) of SL; eyes large, orbit diameter 13.2-17.5% (15.1%) of SL, 45.3-51.4% (47.7%) of HL; body tapering gently from close behind head; posterior tip of preopercular spine reaching to opercular margin; dark brown blotches on dorsal and pelvic fins in preserved specimens; absence of large black blotch on pelvic-fin base .: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Australian slender bigeye is currently being reviewed.

🦐 Diet

small fish
crustaceans
cephalopods

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

🌍 Habitat & Distribution

Marine; reef-associated; depth range 32 - 375 m . Tropical Central Pacific: Australia.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
4±0.6

📐 Morphometrics

Length–Weight Relationship: W = 0.01698 × L2.91 (TL)
Max TL
22.9cm
Dorsal Spines
10
Dorsal Rays
13
Anal Spines
3
Anal Rays
14

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
21.00/100
Low vulnerability
Trophic Level
4
Apex / Top predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Hashimoto & Motomura, 2024

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