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💧 Freshwater Least Concern 🌡️ Tropical

African knifefish

Xenomystus nigri Günther, 1868
Max Length
30 cm
Max Weight
-
Lifespan
-
Trophic Level
3.3
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
25.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Obligate air-breathing ; Prefers quiet waters with vegetation. Females lay 150-200 eggs of 2 mm diameter . Can produce barking sounds. Comes to the surface from time to time to swallow air. Feeds at dusk and during the night on worms, crustaceans, insects and snails .

Scientific Name
Xenomystus nigri
Authority
Günther, 1868
Habitat
Freshwater
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
30 cm
Trophic Level
3.3
Resilience
High
Vulnerability
25.00/100
Water Temp
22–28 °C
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal spines (total): 0; Anal spines: 0; Anal soft rays: 108 - 130. Body height 5-5.4 x SL, head length 6.9-7.5 x SL, snout smaller than eye, eye diameter 3.8-4.5 x head length, maxilla extends to vertical of eye center or just under the eye's posterior border, ventral spines 25-32: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for African knifefish is currently being reviewed.

🦐 Diet

Diet information for African knifefish is currently being compiled.

🥚 Reproduction

Reproduction data for African knifefish is currently being compiled.

🌍 Habitat & Distribution

Freshwater; demersal; pH range: 6.0 - 8.0; dH range: 5 - 19. Tropical; 22°C - 28°C distributed in tropical Africa, in the Nile, Chad, Niger, Ogowe and Congo basins (Ref.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Trophic Level
3.3±0.44

📐 Morphometrics

Length–Weight Relationship: W = 0.00832 × L2.99 (TL)
Max TL
30cm
Anal Rays
119

🌡️ Water Parameters & Tolerance

Temperature Range
22–28°C
pH Range
6–8
Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
25.00/100
Low vulnerability
Trophic Level
3.3
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Günther, 1868

🌐 Names & Taxonomy

Scientific Synonyms

Scientific Name Author Year Status
Notopterus nigri Günther 1868 Synonym
Notopterus nili Steindachner 1881 Synonym
Xenomystes nigri Günther 1868 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 270 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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