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Diadromous Least Concern 🌡️ Subtropical

Large-mouth goby

Redigobius macrostoma Günther, 1861
Max Length
5 cm
Max Weight
-
Lifespan
-
Trophic Level
3.3
Depth
-
Climate
Subtropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Large-mouth goby (Redigobius macrostoma), first described by Günther, 1861 is a small fish in the family Gobiidae (order Gobiiformes). Adults typically reach 5.00 cm in maximum length. It is diadromous, migrating between freshwater and marine environments during its life cycle. It occurs in Subtropical 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
Redigobius macrostoma
Authority
Günther, 1861
Habitat
Diadromous
Climate
Subtropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
5 cm
Trophic Level
3.3
Resilience
High
Vulnerability
10.00/100
Migration
Amphidromous
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 6 - 7; Dorsal soft rays (total): 7 - 8; Anal spines: 1; Anal soft rays: 5 - 7. Distinguished by the following characteristics: compressed head and body; grey to pale brown body, mottled and chequered with dark brown dorsally; 8 oblique narrow dark brown to purplish brown bars along side; large black blotch on first dorsal fin; greatly enlarged mouth in mature males; first spine of dorsal fin always longest; second dorsal rays I,7-8; anal rays I,7; pectoral rays 15-18; lateral scales 25-29; TRB 9-12; predorsal scales 12-16, reaching close up behind eyes .: fusiform / normal.

🌀 Behaviour

Behavioural data for Large-mouth goby is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Marine; freshwater; brackish; benthopelagic; amphidromous . Subtropical

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater 🌿 Brackish
Migration
Amphidromous
Trophic Level
3.3±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.01 × L3 (TL)
Max TL
5cm
Dorsal Spines
7
Dorsal Rays
8
Anal Spines
1
Anal Rays
6

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2024

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.3
Predator
Body Shape
Fusiform / normal
Climate Zone
Subtropical
Described By
Günther, 1861

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