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💧 Freshwater 🌡️ Tropical

Hypomasticus Australis

Hypomasticus australis Shibatta, Oyakawa, Garavello, Britski & Birindelli, 2025
Max Length
27.3 cm
Max Weight
Lifespan
Trophic Level
2.3
Depth
Climate
Tropical
Resilience
Medium
Vulnerability
39.00/100
Typical Length
Depth Zone

📖 Overview

Hypomasticus Australis (Hypomasticus australis) is a ray-finned fish of the family Anostomidae. It inhabits freshwater waters. This species can reach a maximum total length of 27.3 cm. With a trophic level of 2.3, it is an omnivore, consuming both plant and animal matter.

Scientific Name
Hypomasticus australis
Authority
Shibatta, Oyakawa, Garavello, Britski & Birindelli, 2025
Habitat
Freshwater
Climate
Tropical
Body Shape
Elongated
Max Length
27.3 cm
Trophic Level
2.3
Resilience
Medium
Vulnerability
39.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal soft rays (total): 9 - 10; Anal soft rays: 8; Vertebrae: 36. This species is distinguished from its congeners by the following set of characters: 12 scale rows around the caudal peduncle; presence of a subterminal mouth; three midlateral blotches; presence of a diffuse midlateral blotches; thinner lips and a larger size, with the largest specimen analyzed measuring 315.9 mm SL; mouth cleft longitudinally aligned with the ventral margin of second infraorbital bone; and three diffuse midlateral blotches, extending through 4-5 scales horizontally and 2-3 scale rows vertically .: elongated; Cross section: oval.

🌀 Behaviour

Behavioural data for Hypomasticus Australis is currently being reviewed.

🦐 Diet

Diet information for Hypomasticus Australis is currently being compiled.

🥚 Reproduction

Reproduction data for Hypomasticus Australis is currently being compiled.

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical South America: Brazil.

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
2.3±0.1

📐 Morphometrics

Length–Weight Relationship: W = 0.00891 × L3.07 (TL)
Max TL
27.3cm
Dorsal Rays
10
Anal Rays
8
Vertebrae
36

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
39.00/100
Moderate vulnerability
Trophic Level
2.3
Omnivore / Planktivore
Body Shape
Elongated
Climate Zone
Tropical
Described By
Shibatta, Oyakawa, Garavello, Britski & Birindelli, 2025

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