Scientific Name
Gerres oblongus  
Gerres oblongus長身鑽嘴魚
by: Lab of Fish Ecol. and Evo., BRCAS
Author Cuvier, 1830 Depth 5 - 30M
Chinese 長身鑽嘴魚 Poisonous Fish No 
Family_Chinese 鑽嘴魚科 Economic Fish Yes 
Family F373 Gerreidae Edible Fish Yes  Chinese In Mainland China 長圓銀鱸 
Max Length 30 cm  Aquarium Fish No  Common Name 碗米仔 
Distribution in World India Ocean to West Pacific Ocean   Distribution in Taiwan West、South、North、PonFu 
Habitats Coral、Benthos、Estuary、Coastal  Holotype Locality Sri Lanka 
Synonyms Equla oblongus, Gerres gigas, Gerres macrosoma   
Reference 臺灣魚類誌(沈等, 1993)  Cuvier, G. etc. 1830 Iwatsuki, Y. etc. 1993 沈世傑 編 Shih-Chieh Shen ed. 1993 Iwatsuki, Y. etc. 2001 
Specimen List ASIZP0062674. ASIZP0068641. ASIZP0074849. ASIZP0075786. ASIZP0075865. ASIZP0075888. ASIZP0076016. ASIZP0076017. ASIZP0076664. FRIP00461. FRIP00830. NMMBP01086. NMMBP01087. NMMBP04549. NMMBP04550. NMMBP05272. NTUM04340. NTUM04411. NTUM06246.  
Common Name Slender silverbiddy; Oblong pursemouth; Slender silver-biddy; Oblong mojarra; Elongate silver-biddy; Large-bodied silver-biddy 
Redlist Status NL Not in IUCN Redlist     
Characteristic Body compressed, elongate, slender, its depth 3.1 to 3.4 times in standard length; anterodorsal profile very slightly convex. Snout long, subequal to eye diameter. Fin spines slender; Second dorsal fin spine longest, 19-26% fo SL (mean 23%); second anal-fin spine short, about 2/3 length of base of anal fin, even shorter in smaller fish; pectoral fins short, tip of depressed fins reaching almost to or just past level of anus; caudal fin very deeply forked, but lobes not exceptionally long, longest caudal-fin ray about 1/3 standard length. Scales on lateral line 44 to 46 to base of caudal fin; 5.5 to 6 scales between lateral line and base of fifth dorsal-fin spineBody silvery, blue dorsally in life, but lilac brown in some market specimens; up to 5 columns of horizontally elongated spots on sides of trunk appearing as faint bars in some cases; dusky tip to dorsal fin, other fins pale.
habitats Prefers coralline areas. Migrates to specific sandy areas near outer reef edge to spawn in late afternoons during full moon. Feeds on small benthic organisms living on sandy bottoms. In Palau, migrates to specific sandy spots near the outer reef edge to s 
Distribution Indo-Pacific: Red Sea and East Africa to Samoa, north to Ryukyu Islands, south to New Caledonia; east to Tonga. It is a common species in Taiwan except eastern part. 
Utility Marketed fresh.