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

💧 Freshwater Least Concern 🌡️ Subtropical

Western blacknose dace

Rhinichthys obtusus Agassiz, 1854
Max Length
-
Max Weight
-
Lifespan
-
Trophic Level
3.1
Depth
2–5 m
Climate
Subtropical
Resilience
High
Vulnerability
28.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

Adults inhabit cool streams. They feed on aquatic insects . They survive well in aquarium conditions and the pink lateral band of mature males make them attractive for native fish aquaria . Migratory behaviour is undetermined .

Scientific Name
Rhinichthys obtusus
Authority
Agassiz, 1854
Habitat
Freshwater
Climate
Subtropical
IUCN Status
LC
Depth Range
2–5 m
Trophic Level
3.1
Resilience
High
Vulnerability
28.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Physical description for Western blacknose dace is currently being compiled.

🌀 Behaviour

Behavioural data for Western blacknose dace is currently being reviewed.

🦐 Diet

Diet information for Western blacknose dace is currently being compiled.

🥚 Reproduction

Reproduction data for Western blacknose dace is currently being compiled.

🌍 Habitat & Distribution

Freshwater; pelagic; depth range 2 - 5 m . Subtropical North America: primarily in upper Mississippi and Ohio drainages, U.

🌿 Ecology

Zone Preferences
💧 Freshwater 🐟 Pelagic
Trophic Level
3.1±0.37
Food Items

aquatic insects (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.00525 × L3.1 (TL)

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2012

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
28.00/100
Low vulnerability
Trophic Level
3.1
Predator
Climate Zone
Subtropical
Described By
Agassiz, 1854

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Western blacknose dace ↗
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Spotted incorrect or outdated data?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.