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💧 Freshwater 🌡️ Tropical

Hyphessobrycon Ribeiroi

Hyphessobrycon ribeiroi Oliveira, Oliveira & Faria, 2025
Max Length
2.9 cm
Max Weight
-
Lifespan
-
Trophic Level
3.2
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Hyphessobrycon Ribeiroi (Hyphessobrycon ribeiroi) is a ray-finned fish of the family Acestrorhamphidae. It inhabits freshwater waters in benthic environments. This species can reach a maximum total length of 2.9 cm. With a trophic level of 3.2, it is a low-level carnivore, feeding on invertebrates and small organisms.

Scientific Name
Hyphessobrycon ribeiroi
Authority
Oliveira, Oliveira & Faria, 2025
Habitat
Freshwater
Climate
Tropical
Max Length
2.9 cm
Trophic Level
3.2
Resilience
High
Vulnerability
10.00/100
Water Temp
27–28 °C
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal spines (total): 2; Dorsal soft rays (total): 9 - 10; Anal spines: 4; Anal soft rays: 17 - 21. This species is distinguish the species from its congeners and Hemigrammus species by the following characters (see the original description where the long diagnosis looks more as an identification key): humeral blotch very conspicuous, well-defined, and elongated with a shorter and posterior backward extension; longer anal fin, with a higher number of branched anal-fin rays (17?21 vs. 11?14); caudal peduncle blotch large, symmetric, extending into the basis of the middle caudal fin rays; etc. Other distinguishing characters are listed species by species .Cross section: oval.

🌀 Behaviour

Behavioural data for Hyphessobrycon Ribeiroi 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; pH range: 4.0 - 5.5. Tropical; 27°C - 28°C South America: Brazil, Central and lower Amazon basin (Ref.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Trophic Level
3.2±0.31

📐 Morphometrics

Length–Weight Relationship: W = 0.01202 × L3.09 (TL)
Max TL
2.9cm
Dorsal Spines
2
Dorsal Rays
10
Anal Spines
4
Anal Rays
19

🌡️ Water Parameters & Tolerance

Temperature Range
27–28°C
pH Range
4–5.5
Salinity Range
0–0.5ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.2
Predator
Climate Zone
Tropical
Described By
Oliveira, Oliveira & Faria, 2025

🦠 Common Diseases

The following diseases are known to affect Hyphessobrycon Ribeiroi.

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