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🌊 Marine Least Concern 🌡️ Temperate

Hooknose

Agonus cataphractus Linnaeus, 1758
Max Length
21 cm
Max Weight
-
Lifespan
3 yrs
Trophic Level
3.4
Depth
0–270 m
Climate
Temperate
Resilience
Medium
Vulnerability
26.00/100
Typical Length
14 cm
Depth Zone
demersal

📖 Overview

Inhabits inshore waters, deeper waters in winter in Skaggerak, preferring sandy bottoms, rarely with stones. Maximum depth reported at 270 m . Temp. range: 4.0-8.0 °C. Feeds on bottom crustaceans and polychaetes. Matures after about 1 year; a few spawning in the second year . The eggs are laid in seaweed . Spawns in February - April, female laying 2,500-3,000 yellow eggs with a diameter of 2 mm. Period of development is very long and 6-8 mm long pelagic larvae hatch after 10-11 months .

Scientific Name
Agonus cataphractus
Authority
Linnaeus, 1758
Habitat
Marine
Climate
Temperate
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
21 cm
Lifespan
3 years
Depth Range
0–270 m
Trophic Level
3.4
Resilience
Medium
Vulnerability
26.00/100
Water Temp
4–8 °C
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 5 - 6; Dorsal soft rays (total): 6 - 8; Anal soft rays: 5 - 7. Unpaired breast row of plates absent, but paired plate rows cover whole breast. Snout with a pair of strong spiny hooks; numerous barbels on branchiostegal membranes. Dorsal plates 31-34 . Spiny and soft dorsal fins almost fused. No spines on the hind part of the head .: fusiform / normal.

🌀 Behaviour

Behavioural data for Hooknose 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; demersal; depth range 0 - 270 m . Temperate; 4°C - 8°C; 77°N - 43°N, 28°W - 46°E Northeast Atlantic: English Channel to Finmarken and Murman coasts and White Sea, also the Shetlands, the Faroes and southern and southwestern coasts of Iceland; southern part of Baltic.

🌿 Ecology

Zone Preferences
🌊 Marine ⬇️ Benthic
Trophic Level
3.4±0.3
Food Items

bottom crustaceans and polychaetes

📐 Morphometrics

Length–Weight Relationship: W = 0.01023 × L2.98 (TL)
Max TL
21cm
Dorsal Spines
6
Dorsal Rays
7
Anal Rays
6

🌡️ Water Parameters & Tolerance

Temperature Range
4–8°C
Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2013

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
26.00/100
Low vulnerability
Trophic Level
3.4
Predator
Body Shape
Fusiform / normal
Climate Zone
Temperate
Described By
Linnaeus, 1758

🌐 Names & Taxonomy

Scientific Synonyms

Scientific Name Author Year Status
Aspidophorus armatus Lacepède 1801 Synonym
Aspidophorus cataphractus Linnaeus 1758 Synonym
Aspidophorus europaeus Cuvier 1829 Synonym
Cataphractus schoneveldii Fleming 1828 Synonym
Cottus brodamus Bonnaterre 1788 Synonym
Cottus cataphractus Linnaeus 1758 Synonym
Paragonus sertorii Miranda Ribeiro 1918 Synonym
Phalangistes cataphractus Linnaeus 1758 Synonym
Ribeiroa sertorii Miranda Ribeiro 1918 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 51 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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