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🌊 Marine Least Concern 🐠 Aquarium 🌡️ Subtropical

Slender sandgoby

Fusigobius gracilis Randall, 2001
Max Length
4.2 cm
Max Weight
-
Lifespan
-
Trophic Level
3.2
Depth
6–18 m
Climate
Subtropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
demersal

📖 Overview

Slender sandgoby (Fusigobius gracilis) is a ray-finned fish of the family Gobiidae. It inhabits marine (saltwater) waters in benthic environments. This species can reach a maximum total length of 4.2 cm. It occurs at depths between 6 and 18 metres. With a trophic level of 3.2, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Least Concern on the IUCN Red List.

Scientific Name
Fusigobius gracilis
Authority
Randall, 2001
Habitat
Marine
Climate
Subtropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
4.2 cm
Depth Range
6–18 m
Trophic Level
3.2
Resilience
High
Vulnerability
10.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 1; Anal soft rays: 8; Vertebrae: 26. Diagnosis: Dorsal rays VI - I,9. Anal rays 1,8. Pectoral rays 17-19 (usually 18). Longitudinal scale series 25. Head naked except for scales on side of nape reaching nearly to above upper end of preopercular margin; posterior nostril not close to orbit. The body is slender, depth 5.45-5.75 in SL; snout length 3.0-3.4 in head; first dorsal fin not higher than second; second dorsal spine usually longest, 5.35-5.8 in SL. Pelvic fins fully joined medially by membrane (when intact); pelvic frenum absent. Body translucent with numerous very small orange-yellow spots with blackish centers on head and body, those on head arranged in oblique rows; a black spot the size of pupil or smaller at midbase of caudal fin; a second smaller blackish spot just above base of pectoral fin; dorsal and caudal fins with orange-yellow spots; a dusky orange line from upper part of first membrane of first dorsal fin to base of second spine .: fusiform / normal.

🌀 Behaviour

Behavioural data for Slender sandgoby is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

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

🌍 Habitat & Distribution

Marine; demersal; depth range 6 - 18 m . Subtropical east to Fiji.

🌿 Ecology

Zone Preferences
🌊 Marine ⬇️ Benthic
Trophic Level
3.2±0.3

📐 Morphometrics

Length–Weight Relationship: W = 0.01023 × L3.01 (TL)
Max TL
4.2cm
Dorsal Spines
7
Dorsal Rays
9
Anal Spines
1
Anal Rays
8
Vertebrae
26

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2023

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.2
Predator
Body Shape
Fusiform / normal
Climate Zone
Subtropical
Described By
Randall, 2001

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