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🌊 Marine Data Deficient 🌡️ Tropical

Long nostril jawfish

Opistognathus longinaris Vaniz, 2010
Max Length
4.1 cm
Max Weight
-
Lifespan
-
Trophic Level
3.2
Depth
-
Climate
Tropical
Resilience
-
Vulnerability
10.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

Long nostril jawfish (Opistognathus longinaris) is a ray-finned fish of the family Opistognathidae. It inhabits marine (saltwater) waters in pelagic environments. This species can reach a maximum total length of 4.1 cm. With a trophic level of 3.2, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Data Deficient on the IUCN Red List.

Scientific Name
Opistognathus longinaris
Authority
Vaniz, 2010
Habitat
Marine
Climate
Tropical
Body Shape
Elongated
IUCN Status
DD
Max Length
4.1 cm
Trophic Level
3.2
Vulnerability
10.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 10; Dorsal soft rays (total): 20; Anal spines: 3; Anal soft rays: 19; Vertebrae: 34. This species is characterized by the following set of characters: maxilla rigid without flexible lamina posteriorly; D X,20; tentacle on anterior nostril at least 4 times maximum diameter of posterior nostril; oral membrane between dentaries and ‘tongue’ dark brown .: elongated.

🌀 Behaviour

Behavioural data for Long nostril 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 65 - ? m . Tropical South Africa.

🌿 Ecology

Zone Preferences
🌊 Marine 🐟 Pelagic
Trophic Level
3.2±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.00389 × L3.12 (TL)
Max TL
4.1cm
Dorsal Spines
10
Dorsal Rays
20
Anal Spines
3
Anal Rays
19
Vertebrae
34

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2017

📊 Population Risk & Fisheries

Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.2
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Vaniz, 2010

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