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🌊 Marine Least Concern 🌡️ Tropical

Halfblack Triplefin

Enneapterygius hemimelas Kner & Steindachner, 1867
Max Length
4.8 cm
Max Weight
-
Lifespan
-
Trophic Level
3.2
Depth
0–30 m
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Adults are found in various reef habitats especially in reef flats and tidepools and in surf-swept reef margins. Also found in intertidal areas and is usually associated with coralline rock and coral reef lagoons . Eggs are hemispherical and covered with numerous sticky threads that anchor them in the algae on the nesting sites . Larvae are planktonic which occur primarily in shallow, nearshore waters .

Scientific Name
Enneapterygius hemimelas
Authority
Kner & Steindachner, 1867
Habitat
Marine
Climate
Tropical
Body Shape
Elongated
IUCN Status
LC
Max Length
4.8 cm
Depth Range
0–30 m
Latitude
15°S – 30°N
Trophic Level
3.2
Resilience
High
Vulnerability
10.00/100
Migration
Non-migratory
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 15 - 16; Dorsal soft rays (total): 9 - 10; Anal spines: 1; Anal soft rays: 17 - 19. Males have dark lower head and are abruptly dark posterior, occasionally with alternating broad dark and light bands . Adults are identified by the greenish tail and the color usually extends well onto the body . Mature males with two broad, black bands below third dorsal fin base and caudal peduncle, two bands joined ventrally; posterior half of anal fin black in mature males; caudal fin base white; pectoral and pelvic fins and body orange in mature males .: elongated.

🌀 Behaviour

Behavioural data for Halfblack Triplefin 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 0 - 30 m . Tropical; 30°N - 15°S

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Migration
Non-migratory
Trophic Level
3.2±0.3

📐 Morphometrics

Length–Weight Relationship: W = 0.00617 × L3.03 (TL)
Max TL
4.8cm
Dorsal Spines
16
Dorsal Rays
10
Anal Spines
1
Anal Rays
18

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2010

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.2
Predator
Body Shape
Elongated
Climate Zone
Tropical
Latitude Range
30°N – 15°S
Described By
Kner & Steindachner, 1867

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