Gerres oblongus   Cuvier,  1830 (Fish)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Chordata
Class: Actinopterygii
Order:Perciformes
Family:Gerreidae

Image copyrights: Winterbottom, R.

Description
Size: 30 cm.

Color: Silvery, the dorsal with a narrow black margin, in young with indistinct dark transverse, vertical bands.

Oblong, height 3 to 3.4 in length, about equal to length of head, which is pointed, with the rostro-dorsal profile ascending in a nearly straight line. with a slightly concavity above anterior part of eye. Eye 3, in young less than 3 in head, about equal to snout and naked inter orbital space. Maxillary reaching to below front border of eye, profile of mandibula nearly not concave. Preoperculum entire, its angle right, rounded. Seven pointed gillrakers on lower branch of first branchial arch. Lower pharyngeal coossified, forming a triangular plate, posteriorly deeply emarginate and peripherally covered by rather long pointed teeth, in the center granular. Dorsal originates at a distance from end of snout, much shorter than length of spinous and soft portion of dorsal together and more than one fifth longer than height of body. Second dorsal spine rather strong and elongate, in large specimens once and 1/4, in small once and 1/3 contained in length of head. Second anal spine the strongest, nearly thrice in head. Pectorals somewhat longer than head in young, increasing in size with age, reaching vertical through origin of anal. Ventrals more than half length of head. Caudal with the upper lobe somewhat longer, about equal to head. Scales between 5th dorsal fin spine base and lateral line , 4-4.5. Upper jaw extending almost to the level of anterior margin of dermal eye opening. Second dorsal fin spine longest, 19-26% fo SL (mean 23%). Caudal fin dusky (rarely with dark distal margin); lower edge of lower caudal fin hyaline. Dusky stripes absent or very indistinct along scale rows above lateral line (sometimes 4-9 slightly oblique dusky bands in specimens less than about 10 cm SL); 4-9 slightly oblique dusky bands or columns of ovoid dark spots (rarely brownish) immediately below lateral line, but more obvious in preserved or stressed live specimens.

Remarks: Values in above description denote proportions.


Synonym (s)
Gerres oblongus Day, 1875
Gerres oblongus Talwar and Kacker, 1984
Gerres oblongus Bleeker, 1853
Gerres oblongus Gunther, 1862
Gerres gigas Gunther, 1875
Gerres macrosoma Kner, 1868
Gerres gigas Castelnau, 1873
Gerres oblongus Day, 1888
Gerres gigas Macleary, 1882
Gerres oblongus M. Weber, 1895
Gerres gigas Boulenger, 1897
Garres argyeus Seale, 1901
Gerres (Xystaema) gigas Steindachner, 1906
Xystaema gigas Jordan and Seale, 1906
Gerres oblongus M. Weber, 1913
Gerres oblongus Fowler, 1925
Xystaema oblongus Barnard, 1927
Gerres gigas Fowler, 1928
Gerres oblongus Cuvier and Valenciennes, 1830
Equla oblongus (Cuvier, 1830)
(Senior synonym)
Gerres gigas Gunther, 1862
(Junior synonym)
Gerres macrosoma Bleeker, 1854
(Junior synonym)

Common Name (s)
• Oblong Mojarra (English)
• Paiya (Kannada)
• Sala (Mahl)
• Purachi (Malayalam)
• Charbat (Marathi)
• Slender Silver Biddy (English)
• Oblong Silver Biddy (English)
• Majarra (English)
• Keta
• Koto
Economic Importance and Threats
Importance:  Commercial
(Fisheries; marketed fresh)

Ecology
Habitat:  Reef Associated, Sandy
Trophic Level:  Secondary Consumer
Prey:  Benthic invertebrates, detritus

Biogeography


• Andaman and Nicobar Islands, Andaman Islands (Lat: 10) (Long: 93) INDIA
• Orissa, Mahanadi Estuary (Lat: 20.32) (Long: 86.75) INDIA
• INDIA
• Andaman and Nicobar Islands, Andaman Islands INDIA
• Tamil Nadu, Chennai Coast INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Lakshadweep, Agatti INDIA
• Lakshadweep, Amini INDIA
• Lakshadweep, Bitra INDIA
• Lakshadweep, Chettalatt INDIA
• Lakshadweep, Kadamatt INDIA
• Lakshadweep, Kalpeni INDIA
• Lakshadweep, Kavaratti INDIA
• Lakshadweep, Minicoy INDIA
• Lakshadweep, Suheli INDIA
• Lakshadweep INDIA
• SRI LANKA
• Off South East Coast INDIA
• Andaman and Nicobar Islands, Great Nicobar Island INDIA (Record: 08/2000-07/2003)
• Kerala, Ayiramthengu INDIA
• Kerala INDIA
• Lakshadweep, Kadamatt Island (Lat: 11.55) (Long: 72.1) INDIA (Record: 03/1954)
• Lakshadweep, Agatti INDIA (Record: 01/1987-04/1987)
• Lakshadweep, Andrott INDIA (Record: 01/1987-04/1987)
• Lakshadweep, Bangaram INDIA (Record: 01/1987-04/1987)
• Lakshadweep, Bitra INDIA (Record: 01/1987-04/1987)
• Lakshadweep, Chettalatt INDIA (Record: 01/1987-04/1987)
• Lakshadweep, Kadamatt INDIA (Record: 01/1987-04/1987)
• Tamil Nadu, Mandapam INDIA
• Lakshadweep, Minicoy Island (Lat: 8.11) (Long: 73.3) INDIA
• Andaman and Nicobar Islands INDIA
• Gujarat INDIA
• West Bengal (Lat: 21.45) (Long: 87.9) INDIA

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Page last updated on:2012-01-17

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