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🌊 Marine Least Concern 🐠 Aquarium 🌡️ Tropical

Halfbarred goby

Amblygobius semicinctus Bennett, 1833
Max Length
11 cm
Max Weight
-
Lifespan
-
Trophic Level
3
Depth
1–20 m
Climate
Tropical
Resilience
High
Vulnerability
21.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Adults inhabit protected, silty lagoons and estuaries . They occur in pairs, over their burrow beneath rock or rubble; usually hovering a short distance above the bottom. Monogamous . Gut contents of a 6.5 cm SL specimen contains mainly fine, unbranched, filamentous algae and harpacticoid copepods, also polychaetes, tanaids, decapod shrimps, amphipods, and nematodes (may have been parasitic).

Scientific Name
Amblygobius semicinctus
Authority
Bennett, 1833
Habitat
Marine
Climate
Tropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
11 cm
Depth Range
1–20 m
Trophic Level
3
Resilience
High
Vulnerability
21.00/100
Migration
Non-migratory
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 6 - 7; Dorsal soft rays (total): 14 - 15; Anal spines: 1; Anal soft rays: 14 - 15. Characterized by greenish brown body color with complex pattern consisting of longitudinal rows of small white spots; side of body with five narrow brown bars; presence of dark brown band from snout, through eye, to upper back; cheek with white spots and lines; dark-edged red spots dorsally on head; large brown spot above gill opening; basal part of upper caudal fin with large red-brown to blackish spot; 1-2 small black spot on outer part of caudal fin; prolonged third and fourth dorsal spines as short filaments, first dorsal fin taller than second; rounded caudal fin; longitudinal scale series 60-67; ctenoid scales; cycloid scales on nape, abdomen, and breast; predorsal scales 22-25, extending to interorbital space; scales dorsally on opercle, absent on cheek; depth of body 3.5-4.6 in SL .: fusiform / normal; Cross section: compressed.

🌀 Behaviour

Behavioural data for Halfbarred goby is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

Monogamous mating is observed as both obigate and social .

🌍 Habitat & Distribution

Marine; brackish; reef-associated; non-migratory ; depth range 1 - 20 m . Tropical Indian Ocean.

🌿 Ecology

Zone Preferences
🌊 Marine 🌿 Brackish 🪸 Reef Associated
Migration
Non-migratory
Trophic Level
3±0.2

📐 Morphometrics

Length–Weight Relationship: W = 0.01023 × L3.01 (TL)
Max TL
11cm
Dorsal Spines
7
Dorsal Rays
15
Anal Spines
1
Anal Rays
15

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
21.00/100
Low vulnerability
Trophic Level
3
Predator
Body Shape
Fusiform / normal
Climate Zone
Tropical
Described By
Bennett, 1833

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