New 🐟 Mercury Safety Guide & Omega-3 Rankings Updated for 2026. View Omega-3 Rankings →

🌊 Marine Least Concern 🌡️ Deep-water

Trachonurus Robinsi

Trachonurus robinsi Iwamoto, 1997
Max Length
25 cm
Max Weight
-
Lifespan
-
Trophic Level
3.5
Depth
514–1344 m
Climate
Deep-water
Resilience
Medium
Vulnerability
40.00/100
Typical Length
-
Depth Zone
deep-water

📖 Overview

Trachonurus Robinsi (Trachonurus robinsi) is a ray-finned fish of the family Macrouridae. It inhabits marine (saltwater) waters in deep-water environments. This species can reach a maximum total length of 25 cm. It occurs at depths between 514 and 1344 metres. With a trophic level of 3.5, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Least Concern on the IUCN Red List.

Scientific Name
Trachonurus robinsi
Authority
Iwamoto, 1997
Habitat
Marine
Climate
Deep-water
Body Shape
Elongated
IUCN Status
LC
Max Length
25 cm
Depth Range
514–1344 m
Trophic Level
3.5
Resilience
Medium
Vulnerability
40.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 2; Dorsal soft rays (total): 160 - 163. Gill rakers on inner side of first arch 9-11. Scales below midbase of first dorsal fin, 3-5.5; below origin of second dorsal fin, (4-6)+1+(7-10) or a total 12-15. Suborbital width 2.8-4.1 into orbit diameter. Barbel 4.3-7.4. Scales between the first dorsal and lateral line with 9-12 spinules. Scales absent or in narrow patch on gular membrane; absent or a few isolated ones near anterior end on branchiostegal membranes. Adult size small, not longer than 25 cm TL .: elongated.

🌀 Behaviour

Behavioural data for Trachonurus Robinsi 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; bathydemersal; depth range 514 - 1344 m . Deep-water; 22°N - 4°N Central Pacific: known only from the Philippines (Sulu, Visayan, Mindanao and Sibuyan seas).

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water
Trophic Level
3.5±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.00219 × L3.2 (TL)
Max TL
25cm
Dorsal Spines
2
Dorsal Rays
162

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2009

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
40.00/100
Moderate vulnerability
Trophic Level
3.5
Predator
Body Shape
Elongated
Climate Zone
Deep-water
Described By
Iwamoto, 1997

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 1 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Trachonurus Robinsi ↗
Suggest an Edit

Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.

Link to a scientific paper, FishBase, or other authoritative source
Report an Issue

Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.