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Gnathanodon speciosus  (Forsskål, 1775)

Golden trevally
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Gnathanodon speciosus
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Philippines country information

Common names: Badlon, Badlon, Badlon
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: commercial | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from Sorsogon and Cebu City (Ref. 58652), Lanuza Bay (Ref. 104756) and Leyte Gulf (Ref. 68980). Also Ref. 3280.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/rp.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Conlu, P.V., 1986
National Database:

Classification / Names

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Carangidae (Jacks and pompanos) > Caranginae
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Main reference

Size / Weight / Age

Max length : 120 cm TL male/unsexed; (Ref. 11441); common length : 75.0 cm FL male/unsexed; (Ref. 9283); max. published weight: 15.0 kg (Ref. 30874)

Length at first maturity
Lm 32.5  range ? - ? cm

Environment

Marine; reef-associated; depth range ? - 80 m (Ref. 86942)

Climate / Range

Tropical; 35°N - 31°S, 30°E - 77°W

Distribution

Indo-Pacific: from Kwazulu-Natal, South Africa, north to Mie Prefecture, Japan and east to southwestern coast of Baja California Sur, Mexico and Gulf of California to Ecuador (Ref. 9283).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 8; Dorsal soft rays (total): 18-20; Anal spines: 3; Anal soft rays: 15 - 17.

Biology     Glossary (e.g. epibenthic)

Adults occur in deep lagoon and seaward reefs where they feed by rooting for crustaceans and fossorial invertebrates in the sand but they also feed on small fishes (Ref. 9710, 90102). Small juveniles live among the tentacles of jellyfish (Ref. 9710). Adults form schools and are also noted for their behavior to closely swim around sharks and other large fishes, and also follow divers (Ref. 10361). Juveniles particularly display this piloting behavior to gain protection from likely predators (Ref. 9710, 90102). Marketed fresh and salted or dried (Ref. 9283). Juveniles are used in the aquarium trade.

IUCN Red List Status (Ref. 115185)

Threat to humans

  Harmless (Ref. 4795)



Human uses

Fisheries: minor commercial; aquaculture: commercial; gamefish: yes; aquarium: commercial

More information

Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development
References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion
Collaborators
Pictures
Stamps, Coins Misc.
Sounds
Ciguatera
Speed
Swim. type
Gill area
Otoliths
Brains
Vision

Tools

Special reports

Download XML

Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD50 = 1.0000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
3.8   ±0.60 se; Based on food items.

Resilience (Ref. 69278)
Medium, minimum population doubling time 1.4 - 4.4 years (K=0.14-0.53)

Vulnerability (Ref. 59153)
Moderate vulnerability (38 of 100)
Price category (Ref. 80766)
High