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💧 Freshwater Critically Endangered 🌡️ Tropical

Cynolebias Ochraceus

Cynolebias ochraceus Costa, 2014
Max Length
5.7 cm
Max Weight
-
Lifespan
-
Trophic Level
3.2
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Cynolebias Ochraceus (Cynolebias ochraceus) is a ray-finned fish of the family Rivulidae. It inhabits freshwater waters. This species can reach a maximum total length of 5.7 cm. With a trophic level of 3.2, 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
Cynolebias ochraceus
Authority
Costa, 2014
Habitat
Freshwater
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
CR
Max Length
5.7 cm
Trophic Level
3.2
Resilience
High
Vulnerability
10.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal soft rays (total): 14 - 18; Anal soft rays: 17 - 20; Vertebrae: 33 - 34. Cynolebias ochraceus can be diagnosed from C. gilbertoi, the only other member of the C. gilbertoi group, by having 33 vertebrae (vs. 31-32), flank light yellow ochre and anal fin orange-yellow ochre in males (vs. flank pale pinkish brown or light brown, anal fin pink or pinkish grey), and tip of anal-fin filaments reaching basal portion of caudal fin in males (vs. reaching posterior half of caudal fin). It can be further distinguished from C. gilbertoi by having 29-31 caudal-fin rays (vs. 26-29) and 9-12 vomerine teeth (vs.11-16), body depth 35.0-37.8% SL in males (vs. 32.5-35.4% SL), and larger maximum adult size (5.7 cm SL vs. 3.7 cm SL) .: fusiform / normal.

🌀 Behaviour

Behavioural data for Cynolebias Ochraceus is currently being reviewed.

🦐 Diet

Diet information for Cynolebias Ochraceus is currently being compiled.

🥚 Reproduction

Reproduction data for Cynolebias Ochraceus is currently being compiled.

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical South America: middle São Franciso basin in Brazil.

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
3.2±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.01122 × L3.04 (TL)
Max TL
5.7cm
Dorsal Rays
16
Anal Rays
19
Vertebrae
34

🌡️ 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
3.2
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Costa, 2014

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