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🌊 Marine 🌡️ Polar

Naked-head toothfish

Gvozdarus svetovidovi Balushkin, 1989
Max Length
100 cm
Max Weight
-
Lifespan
-
Trophic Level
4.5
Depth
-
Climate
Polar
Resilience
Very low
Vulnerability
69.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

Naked-head toothfish (Gvozdarus svetovidovi), first described by Balushkin, 1989 is a very large fish in the family Nototheniidae (order Perciformes). Adults typically reach 100.00 cm in maximum length. It inhabits marine coastal and open-ocean environments. It occurs in Polar waters. Diet is predominantly piscivorous, targeting other fish and larger prey.

Scientific Name
Gvozdarus svetovidovi
Authority
Balushkin, 1989
Habitat
Marine
Climate
Polar
Body Shape
Fusiform / normal
Max Length
100 cm
Trophic Level
4.5
Resilience
Very low
Vulnerability
69.00/100
Salinity
30–40 ppt

🔬 Taxonomy

🐟 Physical Description

Dorsal spines (total): 7; Dorsal soft rays (total): 30; Anal spines: 0; Anal soft rays: 31; Vertebrae: 51. Light brown ventrally, head, dorsum and sides of trunk dark. Dorsal fins lighter, membranes transparent. Pelvic and anal fins light, mouth and gill cavity dark .: fusiform / normal.

🌀 Behaviour

Behavioural data for Naked-head toothfish 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; pelagic-oceanic; depth range ? - 550 m . Polar; 65°S - 74°S south of the Antarctic Polar Front.

🌿 Ecology

Zone Preferences
🌊 Marine 🐟 Pelagic
Trophic Level
4.5±0.8

📐 Morphometrics

Length–Weight Relationship: W = 0.00631 × L3.15 (TL)
Max TL
100cm
Dorsal Spines
7
Dorsal Rays
30
Anal Rays
31
Vertebrae
51

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Population Resilience
Very low
Minimum doubling time
Fishing Vulnerability
69.00/100
High vulnerability
Trophic Level
4.5
Apex / Top predator
Body Shape
Fusiform / normal
Climate Zone
Polar
Described By
Balushkin, 1989

🌐 Names & Taxonomy

Language Common Names
🇬🇧English naked-head toothfish
🇷🇺Russian Гвоздарь Световидова
🇨🇳Chinese 斯氏格伏南極魚

🗺️ Global Occurrence Map

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

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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