Environment: milieu / climate zone / depth range / distribution range
Marine; demersal. Tropical
Western Pacific: Japan and Philippines.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 17.8 cm TL male/unsexed; (Ref. 1555)
soft rays: 7. U-shaped premaxilla groove fully scaled in specimens over 16 cm SL, producing a broadly rounded margin of the scaled area level with the anterior nostrils (partially scaled in 10 cm SL specimens). Posterior margin of maxilla beyond a vertical through anterior margin of inner dermal eye opening. Scales between 5th dorsal fin spine base 3.5 or 4. Body silvery, bands on body lacking or 6-8 irregular, very faint or dusky, oblique and vertical bands dorsolaterally and ventrolaterally (usually more apparent in young stressed or preserved specimens. Pelvic fin semi-transparent with a faint dusky band and indistinct white distal margin posteriorly or colorless when fresh. Spinous dorsal fin with an indistinct dusky patch (2nd-6th spines) and very narrow dusky distal margins on upper membranes between spines. Supraneural bones 3 (Ref. 35850).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Iwatsuki, Y., S. Kimura and T. Yoshino, 1999. Redescriptions of Gerres baconensis (Evermann & Seale, 1907), G. equulus Temminck & Schlegel, 1844 and G. oyena (Forsskål, 1775), included in the "G. oyena complex", with notes on other related species (Perciformes: Gerreidae). Ichthyol. Res. 46(4):377-395. (Ref. 35850)
IUCN Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 26.5 - 29.2, mean 28.7 °C (based on 647 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01318 (0.00554 - 0.03136), b=3.01 (2.83 - 3.19), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.3 ±0.3 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (16 of 100) .