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Gerres filamentosus  Cuvier, 1829

Whipfin silver-biddy
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Image of Gerres filamentosus (Whipfin silver-biddy)
Gerres filamentosus
Picture by Randall, J.E.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Gerreidae (Mojarras)
Etymology: Gerres: Latin, gerres = a kind of anchovies; cited by Plinius.   More on author: Cuvier.

Environment / Climate / Range Ecology

Marine; freshwater; brackish; demersal; amphidromous (Ref. 51243); depth range 1 - 50 m (Ref. 4372).   Tropical; 26°C - 29°C (Ref. 4959); 32°N - 36°S, 24°E - 171°E

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Indo-Pacific: East Africa and Madagascar to Japan and Australia; New Caledonia (Ref. 26587) and Vanuatu (Ref. 13300). Enters rivers and lakes in Madagascar and the east coast of Africa. Not in the Middle East (Ref. 103159).

Length at first maturity / Size / Weight / Age

Maturity: Lm 19.0  range ? - ? cm
Max length : 35.0 cm TL male/unsexed; (Ref. 4323); common length : 15.0 cm SL male/unsexed; (Ref. 4967)

Short description Morphology | Morphometrics

Dorsal spines (total): 9; Dorsal soft rays (total): 10-11; Anal spines: 2-3; Anal soft rays: 7 - 8.

Biology     Glossary (e.g. epibenthic)

Adults are coastal inhabitants found on soft bottoms (Ref. 44894), over sandy substrate (Ref. 12693). Juveniles are found in brackish mangrove estuaries, sometimes enter fresh water (Ref. 2847, 44894), lakes (Ref. 4323), tidal creeks (Ref. 44894) and lower freshwater reaches of rivers (Ref. 12915). Feed on small crustaceans, polychaetes and forams on sand or muddy-sand bottoms (Ref. 12915), worms and insect larvae (Ref. 12693). Length at first reproduction was reported to be around 12 cm SL, for a population in a South African estuary (D. Woodland, pers.comm. 07/13). Salted or made into fish sauce.

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Juveniles enter estuaries and mangrove areas at 1 cm SL and stay until they reach maturity, at which stage they move out to sea (Ref. 36558).

Main reference Upload your references | References | Coordinator : Woodland, David J. | Collaborators

Woodland, D.J., 1984. Gerreidae. In W. Fischer and G. Bianchi (eds.) FAO species identification sheets for fishery purposes. Western Indian Ocean fishing area 51. Vol. 2. [pag. var.]. FAO, Rome. (Ref. 3409)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: minor commercial
FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01148 (0.00896 - 0.01472), b=3.08 (3.03 - 3.13), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
Trophic Level (Ref. 69278):  3.3   ±0.2 se; Based on diet studies.
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (K=0.7).
Vulnerability (Ref. 59153):  Low vulnerability (21 of 100) .
Price category (Ref. 80766):   Medium.