Gerres oblongus

• Taxonomy
• Physical Description
• Distribution
• Habitat
• Similar Species
• Bibliography
• More Info
• Notes
• Keep Exploring

Overview:

Family: Mojarras; Prefers coralline areas (Ref. 30573). 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 (Ref. 3409, 48635). In Palau, migrates to specific sandy spots near the outer reef edge to spawn in late afternoons around full moon (Ref. 37816). Forms schools. Feeds on small invertebrates found in the sand. Marketed fresh (Ref. 12915).

Taxonomy

Unambiguous Synonyms:

1. Equla oblongus (Cuvier, 1830)
2. Gerres gigas Günther, 1862
3. Gerres macrosoma Bleeker, 1854

Notes:

Name Status: Accepted Name.

Physical Description

Family Gerreidae:

Distribution: most tropical seas. Chiefly marine. In brackish water occasionally; rare in freshwater. Very protractile mouth. Head scaly but with smooth upper surface. Dorsal and anal fins with a sheath of scales along base. Gill membranes not united to isthmus. Deeply forked tail; 24 vertebrae. Maximum length 35 cm, attained in Gerres filamentosus. Small silvery fishes with highly protrusible mouth. They feed by sorting benthic invertebrates from sand. Foodfishes. Assumed to be nonguarders (RF).

The family Gerreidae belongs to the Class Actinopterygii (ray-finned fishes) and the Order Perciformes. It contains 8 genera and 40 species. It may be found in Marine, Brackish, and Freshwater environments and is primarily Marine. Members of this family are not used in the aquarium trade. Reproductively, most members of this family are nonguarders. The main mode of swimming of adult fish in this family is carangiform. Compared with other fish, the activity level of this family tends to be active. Etymology of this family name: Gerreidae: From Plinius, Latin, gerres, -es = a kind of anchovies

Images:

Distribution

Range and Population

Indo-Pacific: Red Sea and East Africa to Samoa and Tonga, north to the Ryukyu Islands, south to New Caledonia.

Habitat

Biome

Saltwater. Reef-associated.

Similar Species

Members of the genus Gerres:

There are approximately 67 species in this genus.: G. ablongus · G. aprion · G. argyrea · G. argyreus (Black-Tip Silverbelly) · G. baconensis (Scaly Snouted Silver-Biddy) · G. bispinosus · G. chrysops (Gold Sheen Silver-Biddy) · G. cinereum · G. cinereus (Broad Mojarra) · G. cinerues · G. cinerum · G. cinerus · G. ciniereus · G. crysops · G. decacanthus (Small Chinese Silver-Biddy) · G. dovii · G. dowi · G. dowii · G. einereus · G. equulus (Japanese Silver-Biddy) · G. erythrourus (Deep-Bodied Mojarra) · G. fasciatus · G. filamentosa · G. filamentosum · G. filamentosus (Filamentous Mojarra) · G. G. · G. herangula · G. infasciatus (Nonbanded Whipfin Mojarra) · G. japonicus · G. kapas (Ikolan) · G. kapaz · G. lefroyi · G. limbatus (Black-Tipped Mojarro) · G. lineatus · G. longirostris (Longtail Silver-Biddy) · G. lucidum · G. decacanthus · G. macracantha · G. macracanthus (Long-Rayed Mojarra) · G. baconensis · G. macrostoma · G. maldivensis · G. marmoratus · G. melanopterus · G. methueni (Evenfin Pursemouth) · G. microphthalmus (Small-Eyed Whipfin Mojarra) · G. nigra · G. nigri (Guinean Striped Mojarra) · G. oblongus (Elongate Silver-Biddy) · G. ocyena · G. olithostoma · G. ovatus · G. oyeana · G. oyena (Black-Tipped Silver-Biddy) · G. peruivianus · G. phaiya (Strong Spined Silver-Biddy) · G. philippinus · G. punctatum · G. rhombea · G. rhombus · G. ruepellii · G. setifer (Black-Tipped Mojarro) · G. silaceus (Malayan Silver-Biddy) · G. simillimus · G. squamipinnis · G. subfasciatus (Common Silver Belly) · G. zebra

Bibliography

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