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💧 Freshwater Extinct 🌡️ Tropical

Western Madagascar cichlid

Ptychochromis onilahy Stiassny & Sparks, 2006
Max Length
8.6 cm
Max Weight
-
Lifespan
-
Trophic Level
3.3
Depth
-
Climate
Tropical
Resilience
High
Vulnerability
13.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Western Madagascar cichlid (Ptychochromis onilahy) is a ray-finned fish of the family Cichlidae. It inhabits freshwater waters in benthic environments. This species can reach a maximum total length of 8.6 cm. With a trophic level of 3.3, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Extinct on the IUCN Red List.

Scientific Name
Ptychochromis onilahy
Authority
Stiassny & Sparks, 2006
Habitat
Freshwater
Climate
Tropical
Body Shape
Short and / or deep
IUCN Status
EX
Max Length
8.6 cm
Trophic Level
3.3
Resilience
High
Vulnerability
13.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal spines (total): 13; Dorsal soft rays (total): 12; Anal spines: 3; Anal soft rays: 8 - 9; Vertebrae: 26 - 27. It is distinguished from all congeners by the presence of a lachrymal plate that extends ventrally to cover a portion of the upper lip . Body deep and laterally compressed . Two inner rows of teeth in both upper and lower jaws . It has cycloid scales above the upper lateral line on the flanks . In life, adults are uniformly gray brown, paler ventrally and lacking any obvious body markings . In preservative, the ground coloration is brownish to golden-brown, lighter ventrally, and all fins are brownish .: short and / or deep.

🌀 Behaviour

Behavioural data for Western Madagascar cichlid is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 👄 Mouth Brooder 🛡️ Egg Guarder
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; demersal. Tropical

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Trophic Level
3.3±0.3

📐 Morphometrics

Length–Weight Relationship: W = 0.01995 × L3.01 (TL)
Max TL
8.6cm
Dorsal Spines
13
Dorsal Rays
12
Anal Spines
3
Anal Rays
9
Vertebrae
27

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Extinct
Assessment Date
2016

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
13.00/100
Low vulnerability
Trophic Level
3.3
Predator
Body Shape
Short and / or deep
Climate Zone
Tropical
Described By
Stiassny & Sparks, 2006

🦠 Common Diseases

The following diseases are known to affect Western Madagascar cichlid.

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