New 🐟 Mercury Safety Guide & Omega-3 Rankings Updated for 2026. View Omega-3 Rankings →

💧 Freshwater Least Concern 🌡️ Tropical

Mastacembelus Dayi

Mastacembelus dayi Boulenger, 1912
Max Length
-
Max Weight
-
Lifespan
-
Trophic Level
3.8
Depth
-
Climate
Tropical
Resilience
Medium
Vulnerability
34.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Mastacembelus Dayi (Mastacembelus dayi), first described by Boulenger, 1912 is a fish in the family Mastacembelidae (order Synbranchiformes). It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. On the IUCN Red List, it is classified as Least Concern.

Scientific Name
Mastacembelus dayi
Authority
Boulenger, 1912
Habitat
Freshwater
Climate
Tropical
IUCN Status
LC
Trophic Level
3.8
Resilience
Medium
Vulnerability
34.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal spines (total): 35; Dorsal soft rays (total): 77 - 82; Anal soft rays: 76 - 79; Vertebrae: 85 - 86. Body and fins with moderately numerous, relatively large, pale spots with dark edges; spots on fins round; but those on body often vertically elongate; caudal fin rays 25-27 .: eel-like.

🌀 Behaviour

Behavioural data for Mastacembelus Dayi is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; demersal. Tropical known only from three specimens from Irrawaddy river, Myanmar.

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Trophic Level
3.8±0.6

📐 Morphometrics

Length–Weight Relationship: W = 0.00269 × L2.94 (TL)
Dorsal Spines
35
Dorsal Rays
80
Anal Rays
78
Vertebrae
86

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2010

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
34.00/100
Low vulnerability
Trophic Level
3.8
Predator
Climate Zone
Tropical
Described By
Boulenger, 1912

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Mastacembelus Dayi ↗
Suggest an Edit

Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.

Link to a scientific paper, FishBase, or other authoritative source
Report an Issue

Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.