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💧 Freshwater Critically Endangered 🌡️ Tropical

Hypsolebias Hamadryades

Hypsolebias hamadryades Costa, Amorim & Mattos, 2018
Max Length
2.7 cm
Max Weight
-
Lifespan
-
Trophic Level
3.1
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Hypsolebias Hamadryades (Hypsolebias hamadryades) is a ray-finned fish of the family Rivulidae. It inhabits freshwater waters. This species can reach a maximum total length of 2.7 cm. With a trophic level of 3.1, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Critically Endangered on the IUCN Red List.

Scientific Name
Hypsolebias hamadryades
Authority
Costa, Amorim & Mattos, 2018
Habitat
Freshwater
Climate
Tropical
IUCN Status
CR
Max Length
2.7 cm
Trophic Level
3.1
Resilience
High
Vulnerability
10.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

This species can be distinguised from its congeners by the following set of characters: males lack the dark greenish grey bars on the anterior portion of the flank; males have transverse blue stripes on the unpaired fin wider than interspace. The body coloration of males can also be distinguished by a combination of the following characters: presence of transverse blue stripes in dorsal fin and one basal row of blue spots; most of the anal fins have transverse blue stripes; presence of blue bars on most portion of caudal fin; 8-10 light red bars between humeral region and the anterior part of the caudal peduncle; dorsal-fin origin anterior to anal-fin origin in males; and having 23 or 24 caudal-fin rays .Cross section: oval.

🌀 Behaviour

Behavioural data for Hypsolebias Hamadryades is currently being reviewed.

🦐 Diet

Diet information for Hypsolebias Hamadryades is currently being compiled.

🥚 Reproduction

Reproduction data for Hypsolebias Hamadryades is currently being compiled.

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical South America: Brazil.

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
3.1±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.01122 × L3.04 (TL)
Max TL
2.7cm

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Critically Endangered
Assessment Date
2021

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.1
Predator
Climate Zone
Tropical
Described By
Costa, Amorim & Mattos, 2018

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