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💧 Freshwater Near Threatened 🌡️ Tropical

Gastromyzon Extrorsus

Gastromyzon extrorsus Tan, 2006
Max Length
7.7 cm
Max Weight
Lifespan
Trophic Level
2
Depth
Climate
Tropical
Resilience
Vulnerability
10.00/100
Typical Length
Depth Zone
demersal

📖 Overview

Gastromyzon Extrorsus (Gastromyzon extrorsus) is a ray-finned fish of the family Balitoridae. It inhabits freshwater waters in benthic environments. This species can reach a maximum total length of 7.7 cm. With a trophic level of 2, it is a herbivore or detritivore. It is assessed as Near Threatened on the IUCN Red List.

Scientific Name
Gastromyzon extrorsus
Authority
Tan, 2006
Habitat
Freshwater
Climate
Tropical
Body Shape
Elongated
IUCN Status
NT
Max Length
7.7 cm
Trophic Level
2
Vulnerability
10.00/100
Salinity
0–0.5 ppt

🐟 Physical Description

Dorsal soft rays (total): 7; Anal soft rays: 4; Vertebrae: 30 - 32. Can be distinguished from other species of the genus by possessing the following unique combination of characters: presence of distinct secondary rostrum; presence of complete post-oral pouch; body brown with up to 9 thin gold bars, head dorsum dark brown with thin gold reticulate pattern; subopercular groove absent; gill slit vertical; sublacrymal groove present; a truncate snout when viewed dorsally; abdomen without scales; lateral line scales 69-77; pelvic fin just touching anal fin origin, adpressed dorsal fin not overlapping level of anal fin origin .: elongated.

🌀 Behaviour

Behavioural data for Gastromyzon Extrorsus is currently being reviewed.

🦐 Diet

Diet information for Gastromyzon Extrorsus is currently being compiled.

🥚 Reproduction

Reproduction data for Gastromyzon Extrorsus is currently being compiled.

🌍 Habitat & Distribution

Freshwater; demersal; pH range: 7.9 - ?. Tropical

🌿 Ecology

Zone Preferences
💧 Freshwater ⬇️ Benthic
Trophic Level
2±0.1

📐 Morphometrics

Length–Weight Relationship: W = 0.00646 × L3.11 (TL)
Max TL
7.7cm
Dorsal Rays
7
Anal Rays
4
Vertebrae
31

🌡️ Water Parameters & Tolerance

Salinity Range
0–0.5ppt

🛡️ Conservation Assessment

IUCN Category
Near Threatened
Assessment Date
2018

📊 Population Risk & Fisheries

Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
2
Omnivore / Planktivore
Body Shape
Elongated
Climate Zone
Tropical
Described By
Tan, 2006

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