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💧 Freshwater 🌡️ Tropical

Imparfinis Arceae

Imparfinis arceae Silva, Sabaj Pérez, Carvalho & Oliveira, 2025
Max Length
6.7 cm
Max Weight
-
Lifespan
-
Trophic Level
3.1
Depth
-
Climate
Tropical
Resilience
Medium
Vulnerability
34.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Imparfinis Arceae (Imparfinis arceae) is a ray-finned fish of the family Heptapteridae. It inhabits freshwater waters in benthic environments. This species can reach a maximum total length of 6.7 cm. With a trophic level of 3.1, it is a low-level carnivore, feeding on invertebrates and small organisms.

Scientific Name
Imparfinis arceae
Authority
Silva, Sabaj Pérez, Carvalho & Oliveira, 2025
Habitat
Freshwater
Climate
Tropical
Body Shape
Elongated
Max Length
6.7 cm
Trophic Level
3.1
Resilience
Medium
Vulnerability
34.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal soft rays (total): 6; Anal soft rays: 7; Vertebrae: 39. This species is distinguished by the following set of characters: wide, dark midlateral stripe from snout tip to caudal peduncle sharply contrasting pale underside and aligned with dark stripe centered on dorsal portion of lower caudal-fin lobe; 11-12 gill rakers on the first ceratobranchial; dark brown W-shaped band at the base of caudal peduncle absent; 39 vertebrae; maxillary barbel surpassing vertical through dorsal-fin origin; short, flexible extension of the pectoral- and dorsal-fin spines, and outermost primary rays of upper caudal-fin lobe absent .: elongated; Cross section: oval.

🌀 Behaviour

Behavioural data for Imparfinis Arceae is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; demersal. Tropical South America: Brazil.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Trophic Level
3.1±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.00813 × L2.97 (TL)
Max TL
6.7cm
Dorsal Rays
6
Anal Rays
7
Vertebrae
39

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
34.00/100
Low vulnerability
Trophic Level
3.1
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Silva, Sabaj Pérez, Carvalho & Oliveira, 2025

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