Behaviour
Characteristically shallow water, schooling fish (especially as juveniles), sweepers are nocturnal and seek shelter under ledges or in the caves, nooks and crannies of reefs or eroded, rocky shorelines during the day. They are often found sharing these hiding places with cardinalfishes and bigeyes, fellow nightowls. At night, sweepers forage for zooplankton, their primary food items.
At least one species, the small-scale bullseye (Pempheris compressa) of Australia, is known to enter coastal estuaries whilst young.
Read more about this topic: Sweeper
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