New 🐟 Mercury Safety Guide & Omega-3 Rankings Updated for 2026. View Omega-3 Rankings →

🌊 Marine Least Concern 🌡️ Tropical

Longjaw shrimpgoby

Psilogobius prolatus Watson & Lachner, 1985
Max Length
5.5 cm
Max Weight
-
Lifespan
-
Trophic Level
3.2
Depth
1–20 m
Climate
Tropical
Resilience
High
Vulnerability
13.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Found in sheltered coastal bays, lagoons and estuaries . Also found in sand-rubble bottoms in 1-20 m (Ref 90102).

Scientific Name
Psilogobius prolatus
Authority
Watson & Lachner, 1985
Habitat
Marine
Climate
Tropical
Body Shape
Elongated
IUCN Status
LC
Max Length
5.5 cm
Depth Range
1–20 m
Trophic Level
3.2
Resilience
High
Vulnerability
13.00/100
Salinity
30–40 ppt

🔬 Taxonomy

Genus
Psilogobius
Psilogobius
Species
Longjaw shrimpgoby
Psilogobius prolatus

🐟 Physical Description

Dorsal spines (total): 6 - 7; Dorsal soft rays (total): 10; Anal spines: 1; Anal soft rays: 9 - 10. Characterized by pale grey to brownish body color with five large, ovate dark brown blotches on side of body; anterior part of body with narrow white bars; upper half of head and body with brown mottling and small blue spots; blue streaks aligned with fin rays on median fins; prolonged and filamentous third dorsal spine; united pelvic fins, well developed frenum present; small ctenoid scales covering body; head without scales except small patch of ctenoid scales above operculum; greatest depth of body 5.4-5.6 in SL; oblong caudal fin, equal or longer than head length .: elongated; Cross section: oval.

🌀 Behaviour

Behavioural data for Longjaw shrimpgoby 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; reef-associated; depth range 1 - 20 m . Tropical

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3.2±0.3

📐 Morphometrics

Length–Weight Relationship: W = 0.00741 × L3.09 (TL)
Max TL
5.5cm
Dorsal Spines
7
Dorsal Rays
10
Anal Spines
1
Anal Rays
10

🌡️ 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
13.00/100
Low vulnerability
Trophic Level
3.2
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Watson & Lachner, 1985

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Longjaw shrimpgoby ↗
Suggest an Edit

Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.

Link to a scientific paper, FishBase, or other authoritative source
Report an Issue

Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.