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🌊 Marine Least Concern 🌡️ Subtropical

Upside-down goby

Bryaninops nexus Larson, 1987
Max Length
2.3 cm
Max Weight
-
Lifespan
-
Trophic Level
3.1
Depth
3–50 m
Climate
Subtropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Occurs on lagoon reefs and hovers upside-down among thickets of the staghorn coral Acropora formosa . Often seen resting on underside of coral branches and makes short forays into water column to feed on planktons (Ref 90102).

Scientific Name
Bryaninops nexus
Authority
Larson, 1987
Habitat
Marine
Climate
Subtropical
Body Shape
Elongated
IUCN Status
LC
Max Length
2.3 cm
Depth Range
3–50 m
Trophic Level
3.1
Resilience
High
Vulnerability
10.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 7; Dorsal soft rays (total): 7 - 8; Anal spines: 1; Anal soft rays: 7 - 8. Characterized by having semi-transparent body with dusky stripe on side of snout; presence of broad reddish brown stripe from rear eye to dorsal surface of abdomen and along ventral body to caudal fin base; pectoral rays unbranched and not thickened; longitudinal scale series 33-41; shallow cup, pelvic disc; opening of gill usually reaching to below middle or rear half of eye .: elongated; Cross section: compressed.

🌀 Behaviour

Behavioural data for Upside-down goby is currently being reviewed.

🦐 Diet

Diet information for Upside-down goby is currently being compiled.

🥚 Reproduction

Reproduction data for Upside-down goby is currently being compiled.

🌍 Habitat & Distribution

Marine; reef-associated; depth range 3 - 50 m . Subtropical

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3.1±0.3
Food Items

planktons (Ref 90102)

📐 Morphometrics

Length–Weight Relationship: W = 0.00741 × L3.09 (TL)
Max TL
2.3cm
Dorsal Spines
7
Dorsal Rays
8
Anal Spines
1
Anal Rays
8

🌡️ 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
3.1
Predator
Body Shape
Elongated
Climate Zone
Subtropical
Described By
Larson, 1987

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