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

💧 Freshwater 🌡️ Tropical

Rhyacoglanis Varii

Rhyacoglanis varii Shibatta, 2023
Max Length
6.9 cm
Max Weight
-
Lifespan
-
Trophic Level
3.4
Depth
-
Climate
Tropical
Resilience
-
Vulnerability
10.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

This species inhabits shallow, running water with substrate composed of pebbles, rocks, sand, and organic litter from the surrounding marginal vegetation .

Scientific Name
Rhyacoglanis varii
Authority
Shibatta, 2023
Habitat
Freshwater
Climate
Tropical
Max Length
6.9 cm
Trophic Level
3.4
Vulnerability
10.00/100
Salinity
0–0.5 ppt

🔬 Taxonomy

Genus
Rhyacoglanis
Rhyacoglanis
Species
Rhyacoglanis Varii
Rhyacoglanis varii

🐟 Physical Description

Dorsal spines (total): 2; Dorsal soft rays (total): 6; Anal soft rays: 5 - 6. This species is distinguished from its congeners by the following set of characters: dark brown vertical bar below the dorsal-fin base not confluent with a dark brown bar below the adipose-fin base; abrupt thinning of the subdorsal dark brown bar ventrally; dark brown spots sparsely distributed on the body; solid dark brown bar on caudal peduncle; posterior tip of the post-cleithral process reaching vertical through the base of the dorsal-fin spine; long distance of anus to anal-fin origin (mean = 11.4±0.8%), maxillary barbel length (mean = 79.6±5.8%), and caudal peduncle depth (mean = 9.5±0.5%); minor posterior nostril to eye distance (mean = 4.8±0.9%), body depth (mean = 18.2±1.5%), and postcleithral process length (mean = 12.9±1.1%); anterior serrae distributed along the entire margin .Cross section: oval.

🌀 Behaviour

Behavioural data for Rhyacoglanis Varii is currently being reviewed.

🦐 Diet

Diet information for Rhyacoglanis Varii is currently being compiled.

🥚 Reproduction

Reproduction data for Rhyacoglanis Varii is currently being compiled.

🌍 Habitat & Distribution

Freshwater; demersal. Tropical South America: Brazil.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Trophic Level
3.4±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.0055 × L3.11 (TL)
Max TL
6.9cm
Dorsal Spines
2
Dorsal Rays
6
Anal Rays
6

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

📊 Population Risk & Fisheries

Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.4
Predator
Climate Zone
Tropical
Described By
Shibatta, 2023

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Rhyacoglanis Varii ↗
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.