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.
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Pulau Semakau,
Aug 05

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

St. John's Island, Oct 11
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Pulau Hantu, Jan 11
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Pulau Senang, Aug 10
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Cyrene Reef, Jul 10
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Sisters Island, Nov 05

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Labrador, Dec 04

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Chek Jawa, Aug 05

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*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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