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

🌊 Marine Least Concern 🌡️ Deep-water

Longbarb dragonfish

Flagellostomias boureei Zugmayer, 1913
Max Length
32.2 cm
Max Weight
-
Lifespan
-
Trophic Level
4.6
Depth
0–3000 m
Climate
Deep-water
Resilience
Medium
Vulnerability
44.00/100
Typical Length
-
Depth Zone
deep-water

📖 Overview

Longbarb dragonfish (Flagellostomias boureei) is a ray-finned fish of the family Stomiidae. It inhabits marine (saltwater) waters in deep-water environments. This species can reach a maximum total length of 32.2 cm. It occurs at depths between 0 and 3000 metres. With a trophic level of 4.6, it is an apex predator. It is assessed as Least Concern on the IUCN Red List.

Scientific Name
Flagellostomias boureei
Authority
Zugmayer, 1913
Habitat
Marine
Climate
Deep-water
Body Shape
Elongated
IUCN Status
LC
Max Length
32.2 cm
Depth Range
0–3000 m
Latitude
49°S – 45°N
Trophic Level
4.6
Resilience
Medium
Vulnerability
44.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 14 - 17; Anal spines: 0; Anal soft rays: 21 - 26. Body compressed. Stem of barbel spotted with numerous patches of white luminous tissue .: elongated.

🌀 Behaviour

Behavioural data for Longbarb dragonfish is currently being reviewed.

🦐 Diet

Diet information for Longbarb dragonfish is currently being compiled.

🥚 Reproduction

Reproduction data for Longbarb dragonfish is currently being compiled.

🌍 Habitat & Distribution

Marine; bathypelagic; depth range 0 - 3000 m . Deep-water; 45°N - 49°S, 98°W - 154°W South Africa.

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water
Trophic Level
4.6±0.8

📐 Morphometrics

Length–Weight Relationship: W = 0.00309 × L3.12 (TL)
Max TL
32.2cm
Dorsal Rays
16
Anal Rays
24

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2013

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
44.00/100
Moderate vulnerability
Trophic Level
4.6
Apex / Top predator
Body Shape
Elongated
Climate Zone
Deep-water
Latitude Range
45°N – 49°S
Described By
Zugmayer, 1913

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Black Dragonfish · Longbarb Dragonfish · Scaleless dragonfish
🌍CES svítivka Boureeova
🇫🇮Finnish rihmapiikkisuu
🇫🇷French Idiacanthe Ruban
🇯🇵Japanese Muchihoshieso · ムチホシエソ
🇵🇹Portuguese Peixe-dragão-sul-africano
🇷🇺Russian Флагеллостомия Буре · Фрагеллостомия
🇪🇸Spanish dragón de barba larga

Scientific Synonyms

Scientific Name Author Year Status
Aristostomias uncodentatus Borodin 1930 Synonym
Eustomias boureei Zugmayer 1913 Synonym
Flagellostomias tyrannus Parr 1927 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 64 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 Longbarb dragonfish ↗
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.