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🌊 Marine Least Concern 🌡️ Subtropical

Long-rayed sand-diver

Trichonotus elegans Shimada & Yoshino, 1984
Max Length
18 cm
Max Weight
-
Lifespan
-
Trophic Level
3.5
Depth
2–40 m
Climate
Subtropical
Resilience
-
Vulnerability
12.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Found in coastal reef slopes and deep outer reef lagoons in current channels. Usually in large groups with several large males . Inhabits sand-rubble bottoms . Found hovering above sandy slopes. Usually forms a harem of one male-phase fish and about a dozen female-phase fish . Normally buried when no current is running .

Scientific Name
Trichonotus elegans
Authority
Shimada & Yoshino, 1984
Habitat
Marine
Climate
Subtropical
Body Shape
Elongated
IUCN Status
LC
Max Length
18 cm
Depth Range
2–40 m
Trophic Level
3.5
Vulnerability
12.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 3; Dorsal soft rays (total): 43 - 45; Anal spines: 1; Anal soft rays: 39 - 42. Identified by the long filaments on the dorsal fin of the male . Body scaleless above and below lateral line on anterior half (Ref 12934).: elongated.

🌀 Behaviour

Behavioural data for Long-rayed sand-diver 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; depth range 2 - 40 m . Subtropical West Pacific: Maldive Islands to Micronesia and Fiji, north to Ryukyu Islands.

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3.5±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.00389 × L3.12 (TL)
Max TL
18cm
Dorsal Spines
3
Dorsal Rays
44
Anal Spines
1
Anal Rays
41

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2015

📊 Population Risk & Fisheries

Fishing Vulnerability
12.00/100
Low vulnerability
Trophic Level
3.5
Predator
Body Shape
Elongated
Climate Zone
Subtropical
Described By
Shimada & Yoshino, 1984

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Elegant Sand Diver · Elegant sand-diver · Long-rayed Sand Diver · Threadfin Sand Diver
🇯🇵Japanese Ryuguberagimpo · リュウグウベラギンポ
🇵🇹Portuguese Aguile-elegante
🇨🇳Chinese 沙鰍 · 美麗毛背魚 · 美麗絲鰭鱚

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 2 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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