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💧 Freshwater 🌡️ Tropical

Yellow Batasio

Batasio flavus Plamoottil, 2015
Max Length
10.6 cm
Max Weight
-
Lifespan
-
Trophic Level
3.3
Depth
0–6 m
Climate
Tropical
Resilience
High
Vulnerability
17.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Inhabits the river stretch of Manimala River at Paduthode where it occurs generally on sand or sandy gravel bottom with occasional presence of bed rock or black clays. The width and depth of this area are 45.0-125.0 m and 0.3-6 m, respectively; bank height is 4.0-5.0 m above general water level in summer season; blanketed by moderate to dense riparian vegetation with intermittent occurrence of low riparian vegetation noticed at certain places. This species is unique for it requires spotless and clear water and is intolerant to the accumulation of organic wastes and other contaminants, thus regular monitoring of the water quality is essential for the protection and preservation of this rare species .

Scientific Name
Batasio flavus
Authority
Plamoottil, 2015
Habitat
Freshwater
Climate
Tropical
Body Shape
Elongated
Max Length
10.6 cm
Depth Range
0–6 m
Trophic Level
3.3
Resilience
High
Vulnerability
17.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal spines (total): 1; Dorsal soft rays (total): 7; Anal spines: 4; Anal soft rays: 9 - 10. This species is distinguished from its congeners in having the following characters: slender body (BDD 16.0-18.0 % SL); the body and fins are yellowish; dorsal profile nearly straight; with a single median longitudinal groove on head; occipital process very small and hidden under skin; adipose dorsal fin with a straight margin for entire length and inserted behind a considerable distance from rayed dorsal fin; flat head (HD 53.0-57.1 % SL) and orbits widely set (IOW 27.0-31.3 % HL) .: elongated; Cross section: oval.

🌀 Behaviour

Behavioural data for Yellow Batasio is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Freshwater; benthopelagic; depth range 0 - 6 m . Tropical

🌿 Ecology

Zone Preferences
💧 Freshwater
Trophic Level
3.3±0.1

📐 Morphometrics

Length–Weight Relationship: W = 0.00871 × L2.93 (TL)
Max TL
10.6cm
Dorsal Spines
1
Dorsal Rays
7
Anal Spines
4
Anal Rays
10

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
17.00/100
Low vulnerability
Trophic Level
3.3
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Plamoottil, 2015

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