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💧 Freshwater Data Deficient 🐠 Aquarium 🌡️ Tropical

Micralestes Holargyreus

Micralestes holargyreus Günther, 1873
Max Length
8 cm
Max Weight
-
Lifespan
-
Trophic Level
3.1
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
pelagic

📖 Overview

Micralestes Holargyreus (Micralestes holargyreus), first described by Günther, 1873 is a small fish in the family Alestidae (order Characiformes). Adults typically reach 8.00 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Data Deficient.The species is kept in the aquarium hobby. Care requirements and behaviour align broadly with other Alestidae kept in the hobby.

Scientific Name
Micralestes holargyreus
Authority
Günther, 1873
Habitat
Freshwater
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
DD
Max Length
8 cm
Trophic Level
3.1
Resilience
High
Vulnerability
10.00/100
Salinity
0–0.5 ppt

🔬 Taxonomy

Kingdom
Animalia
Phylum
Chordata
Class
Teleostei
Teleostei
Order
Characiformes
Characiformes
Family
Alestidae
Alestidae
Genus
Micralestes
Micralestes
Species
Micralestes Holargyreus
Micralestes holargyreus

🐟 Physical Description

Dorsal spines (total): 2; Dorsal soft rays (total): 8. Body height 2.6-2.9 times in standard length . Head length 3.5-3.8 times in standard length . Cuspid number: external row of upper jaw 1, internal row of upper jaw 6-9, external row of lower jaw 5-7, internal row of lower jaw 1 . Base of the scales in the middle of the flank dark . Fins without black marks . Living specimens with silvery lateral band .: fusiform / normal.

🌀 Behaviour

Behavioural data for Micralestes Holargyreus is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; pelagic. Tropical

🌿 Ecology

Zone Preferences
💧 Freshwater 🐟 Pelagic
Trophic Level
3.1±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.01072 × L3.02 (TL)
Max TL
8cm
Dorsal Spines
2
Dorsal Rays
8

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2009

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.1
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Günther, 1873

🌐 Names & Taxonomy

Scientific Synonyms

Scientific Name Author Year Status
Alestes brevipinnis Perugia 1892 Synonym
Alestes holargyreus Günther 1873 Synonym
Micralestes acutidens holargyreus Günther 1873 Synonym

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 6 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

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