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

💧 Freshwater Least Concern 🌡️ Tropical

aquarium

Auchenipterus nuchalis Spix & Agassiz, 1829
Max Length
27 cm
Max Weight
-
Lifespan
-
Trophic Level
3.6
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
24.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

Inhabits lower courses of the larger rivers. Free swimming species found near the surface. Nocturnal, plus active during dusk and dawn. Feeds on smaller fish. The male is recognizable by his thick, ossified maxillary barbels and by the first few rays of the anal fin which are fused, supporting the urogenyla tube that runs along the anterior border to the tip of the rays . This fish comprises the majority of the catches in the fish nets and is especially captured during the rainy season which is its reproductive period. Occurs less frequently in flood zones, prefers eroded zones where it appears in large numbers .

Scientific Name
Auchenipterus nuchalis
Authority
Spix & Agassiz, 1829
Habitat
Freshwater
Climate
Tropical
Body Shape
Elongated
IUCN Status
LC
Max Length
27 cm
Trophic Level
3.6
Resilience
High
Vulnerability
24.00/100
Water Temp
20–22 °C
Salinity
0–0.5 ppt

🐟 Physical Description

: elongated.

🌀 Behaviour

Behavioural data for aquarium is currently being reviewed.

🦐 Diet

Diet information for aquarium is currently being compiled.

🥚 Reproduction

Reproduction data for aquarium is currently being compiled.

🌍 Habitat & Distribution

Freshwater; pelagic; pH range: 6.7 - 7.2; dH range: 7 - 16. Tropical; 20°C - 22°C South America: Lower Amazon and Tocantins rivers northward to Marowijne River.

🌿 Ecology

Zone Preferences
💧 Freshwater 🐟 Pelagic
Trophic Level
3.6±0.51
🌙 Nocturnal
Food Items

smaller fish

📐 Morphometrics

Length–Weight Relationship: W = 0.00955 × L3 (TL)
Max TL
27cm

🌡️ Water Parameters & Tolerance

Temperature Range
20–22°C
pH Range
6.7–7.2
Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2020

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
24.00/100
Low vulnerability
Trophic Level
3.6
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Spix & Agassiz, 1829

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Moustache catfish
🌍CES trnovčík capimský
🇩🇪German Schnauzbartwels
🇫🇷French Auchéniptère, Silure rayé
🇵🇹Portuguese Gato · Mandi peruano · Mandubi · Olho-de-gato · Peixe-gato
🇪🇸Spanish Barbudo · Maparate

Scientific Synonyms

Scientific Name Author Year Status
Hypophthalmus nuchalis Spix & Agassiz 1829 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 78 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for aquarium ↗
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.