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🌊 Marine Least Concern 🌡️ Deep-water

Scaleless Dragonfish

Eustomias obscurus Vaillant, 1884
Max Length
22.5 cm
Max Weight
-
Lifespan
-
Trophic Level
4.5
Depth
20–1900 m
Climate
Deep-water
Resilience
Medium
Vulnerability
35.00/100
Typical Length
-
Depth Zone
deep-water

📖 Overview

Scaleless Dragonfish (Eustomias obscurus) 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 22.5 cm. It occurs at depths between 20 and 1900 metres. With a trophic level of 4.5, it is an apex predator. It is assessed as Least Concern on the IUCN Red List.

Scientific Name
Eustomias obscurus
Authority
Vaillant, 1884
Habitat
Marine
Climate
Deep-water
Body Shape
Elongated
IUCN Status
LC
Max Length
22.5 cm
Depth Range
20–1900 m
Latitude
30°S – 43°N
Trophic Level
4.5
Resilience
Medium
Vulnerability
35.00/100
Salinity
30–40 ppt

🔬 Taxonomy

Kingdom
Animalia
Phylum
Chordata
Class
Teleostei
Teleostei
Order
Stomiiformes
Stomiiformes
Family
Stomiidae
Stomiidae
Genus
Eustomias
Eustomias
Species
Scaleless Dragonfish
Eustomias obscurus

🐟 Physical Description

Dorsal soft rays (total): 23 - 30. Body elongate and very slender. Long, protrusible snout, long chin barbel bearing a single or double terminal bulbs .: elongated.

🌀 Behaviour

Behavioural data for Scaleless Dragonfish is currently being reviewed.

🦐 Diet

Diet information for Scaleless Dragonfish is currently being compiled.

🥚 Reproduction

Reproduction data for Scaleless Dragonfish is currently being compiled.

🌍 Habitat & Distribution

Marine; bathypelagic; depth range 20 - 1900 m . Deep-water; 43°N - 30°S south to Guinea, and from Democratic Republic of the Congo to Namibia.

🌿 Ecology

Zone Preferences
🌊 Marine 🌑 Deep Water
Trophic Level
4.5±0.8

📐 Morphometrics

Length–Weight Relationship: W = 0.00309 × L3.12 (TL)
Max TL
22.5cm
Dorsal Rays
27

🌡️ 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
35.00/100
Low vulnerability
Trophic Level
4.5
Apex / Top predator
Body Shape
Elongated
Climate Zone
Deep-water
Latitude Range
43°N – 30°S
Described By
Vaillant, 1884

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Pairedlight Dragonfish · Scaleless Dragonfish
🌍CES svítivka temná
🇫🇮Finnish puikkopiikkisuu
🇵🇹Portuguese Peixe-dragão-obscuro
🇷🇺Russian Эустома Шабано

Scientific Synonyms

Scientific Name Author Year Status
Eustomias chabanaudi Bailly 1930 Synonym
Eustomias macrorhynchus Pappenheim 1912 Synonym
Eustomias proximus Welsh 1923 Synonym
Eustomias zugmayeri Parr 1927 Synonym
Pareustomias chabanaudi Bailly 1930 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 105 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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