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Phylum Chordata > Subphylum Vertebrate > fishes > Family Gerreidae

Common mojarra
Gerres oyena*
Family Gerreidae
updated Feb 11

Where seen? This little silvery fish with dark diagonal bars is often seen in groups in pools at low tide on many of our shores, in sandy areas near seagrasses, reefs and rubble. This fish has a widespread distribution in the Indo-Pacific.

Features: Those seen about 5-10cm, can grow to 25cm. Body slender, long and silvery. The dorsal fin has a blackish tip. Juveniles have 7-8 dusky diagonal bars which disappear as they grow older.

Sometimes confused with Glass perchlets (Family Chandidae) which have a deeply notched dorsal fin, that Mojarras lack.

What does it eat? It sucks up a mouthful of sand with the protractile mouth and sorts out edible bottom dwelling creatures, before spitting out the debris and sand.

Pulau Semakau, Aug 05

Dorsal fin single continunous (not notched) with blackish tip.
Human uses: It may be sold fresh in local markets and is also ground up and used as fish meal or fed to ducks.

Common mojarras on Singapore shores

St. John's Island, Oct 11

Pulau Hantu, Jan 11


Pulau Senang, Aug 10

Cyrene Reef, Jul 10


Sisters Island, Nov 05

Labrador, Dec 04

Chek Jawa, Aug 05

more photos of common mojarras on Singapore shores
northern shores
southern shores part 1 | part 2

*Identification needs confirmation. Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display.

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