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

🌊 Marine Least Concern 🌡️ Deep-water

Broomfin dragonfish

Thysanactis dentex Regan & Trewavas, 1930
Max Length
18 cm
Max Weight
-
Lifespan
-
Trophic Level
4.3
Depth
100–1000 m
Climate
Deep-water
Resilience
Medium
Vulnerability
31.00/100
Typical Length
-
Depth Zone
deep-water

📖 Overview

Broomfin dragonfish (Thysanactis dentex), first described by Regan & Trewavas, 1930 is a medium-sized fish in the family Stomiidae (order Stomiiformes). Adults typically reach 18.00 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 100 to 1000 metres. It occurs in Deep-water waters. Diet is predominantly piscivorous, targeting other fish and larger prey. On the IUCN Red List, it is classified as Least Concern.

Scientific Name
Thysanactis dentex
Authority
Regan & Trewavas, 1930
Habitat
Marine
Climate
Deep-water
Body Shape
Elongated
IUCN Status
LC
Max Length
18 cm
Depth Range
100–1000 m
Latitude
30°S – 18°N
Trophic Level
4.3
Resilience
Medium
Vulnerability
31.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal soft rays (total): 17 - 18; Anal soft rays: 21 - 25. Body slender. Chin barbel as long as head, pigmented with white spots. Tip of barbel white, small spindle-shaped bulb, minute and rounded terminal body .: elongated.

🌀 Behaviour

Behavioural data for Broomfin dragonfish is currently being reviewed.

🦐 Diet

small fish
crustaceans
cephalopods

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

🌍 Habitat & Distribution

Marine; bathypelagic; depth range 100 - 1000 m . Deep-water; 18°N - 30°S, 62°W - 150°W

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water
Trophic Level
4.3±0.8

📐 Morphometrics

Length–Weight Relationship: W = 0.00309 × L3.12 (TL)
Max TL
18cm
Dorsal Rays
18
Anal Rays
23

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2014

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
31.00/100
Low vulnerability
Trophic Level
4.3
Apex / Top predator
Body Shape
Elongated
Climate Zone
Deep-water
Latitude Range
18°N – 30°S
Described By
Regan & Trewavas, 1930

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Broomfin 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.