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🌊 Marine Least Concern 🌡️ Subtropical

Smallmouth grunt

Brachygenys chrysargyrea Günther, 1859
Max Length
23 cm
Max Weight
-
Lifespan
-
Trophic Level
3.5
Depth
0–25 m
Climate
Subtropical
Resilience
High
Vulnerability
28.00/100
Typical Length
17 cm
Depth Zone
reef

📖 Overview

Inhabits exposed rocky areas and coral reefs. Often near elkhorn and staghorn corals . Commonly found in schools. Juveniles are encountered in Thalassia beds . Adults are observed in coral reefs during the day but enters open waters at night to feed on mainly on plankton , but also on small crustaceans and mollusks. Marketed fresh .

Scientific Name
Brachygenys chrysargyrea
Authority
Günther, 1859
Habitat
Marine
Climate
Subtropical
Body Shape
Fusiform / normal
IUCN Status
LC
Max Length
23 cm
Depth Range
0–25 m
Latitude
34°S – 32°N
Trophic Level
3.5
Resilience
High
Vulnerability
28.00/100
Salinity
30–40 ppt

🔬 Taxonomy

Genus
Brachygenys
Brachygenys
Species
Smallmouth grunt
Brachygenys chrysargyrea

🐟 Physical Description

Dorsal spines (total): 12; Dorsal soft rays (total): 13; Anal spines: 3; Anal soft rays: 9 - 10. 6 straight, even, and nearly equally wide bronze-yellow stripes on side . Snout short, mouth nearly horizontal and small, the maxilla usually not reaching a vertical at front edge of pupil; fins largely yellow .: fusiform / normal.

🌀 Behaviour

Behavioural data for Smallmouth grunt is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous

Oviparous, distinct pairing during breeding .

🌍 Habitat & Distribution

Marine; reef-associated; depth range 0 - 25 m . Subtropical; 32°N - 34°S, 98°W - 34°W

🌿 Ecology

Zone Preferences
🌊 Marine 🪸 Reef Associated
Trophic Level
3.5±0.2
🐠 Schooling
Food Items

mainly on plankton (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.0123 × L2.99 (TL)
Max TL
23cm
Dorsal Spines
12
Dorsal Rays
13
Anal Spines
3
Anal Rays
10

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2011

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
28.00/100
Low vulnerability
Trophic Level
3.5
Predator
Body Shape
Fusiform / normal
Climate Zone
Subtropical
Latitude Range
32°N – 34°S
Described By
Günther, 1859

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