Mojarras and silver-biddies are the common names used for the members of Gerreidae family. They often occur near the bottom in coastal waters of most tropical seas. They are mainly saltwater fishes but can also occur in brackish water and sometimes freshwater. They are recognized as small silvery fishes with terminal and highly protractile mouth. Their scales are large, obvious but deciduous.
Mojarras are often found in coastal lagoons and estuaries with sandy or muddy bottoms near mangroves. They can be found in school, small group or singly. They feed on small invertebrates gleaned from the bottom by taking up mouthfuls of substrate and expelling sand and debris.
There are 7 genera and about 51 species of Gerreidae worldwide. Malaysia has 2 genera and about 9 species.