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💧 Freshwater Near Threatened 🌡️ Tropical

Oryzias Nebulosus

Oryzias nebulosus Parenti & Soeroto, 2004
Max Length
3.3 cm
Max Weight
-
Lifespan
-
Trophic Level
3.3
Depth
-
Climate
Tropical
Resilience
Low
Vulnerability
10.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Collected in the morning in clear water over a bottom of sand, pebbles and fallen branches and during night time from a boat traveling along the lake shore, including the mouth of the tributary stream . Infested with parasitic copepods, Lernaea sp. .

Scientific Name
Oryzias nebulosus
Authority
Parenti & Soeroto, 2004
Habitat
Freshwater
Climate
Tropical
Body Shape
Elongated
IUCN Status
NT
Max Length
3.3 cm
Trophic Level
3.3
Resilience
Low
Vulnerability
10.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal soft rays (total): 9 - 11; Anal soft rays: 21 - 22; Vertebrae: 30 - 32. Having a unique sexual dichromatism: adult males dark gray to black in color, while females lighter grayish-yellow to brown. Some adult males possess external conical teeth on the jaws. Lateral process of pelvic bone is in line with the third or fourth pleural rib; precaudal vertebrae 11-13, modally 12; and dorsal fin relatively anterior (origin above 12-14th anal-fin ray); straight, narrow and slender ossified and cartilaginous portions of the gill arches. Dorsal body profile arches gently from head to dorsal-fin origin .: elongated.

🌀 Behaviour

Behavioural data for Oryzias Nebulosus is currently being reviewed.

🦐 Diet

Diet information for Oryzias Nebulosus is currently being compiled.

🥚 Reproduction

Reproduction data for Oryzias Nebulosus is currently being compiled.

🌍 Habitat & Distribution

Freshwater; benthopelagic. Tropical; 1°S - 3°S, 120°W - 121°W Endemic to Lake Poso and its tributary stream, Sulawesi, Indonesia.

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
3.3±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00437 × L3.11 (TL)
Max TL
3.3cm
Dorsal Rays
10
Anal Rays
22
Vertebrae
31

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Near Threatened
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.3
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Parenti & Soeroto, 2004

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