how fish food get in the water ?
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Filter feeders obtain food from suspended plant or animal matter. This is usually accomplished by passing water through some type of a specialized filtering structure in their mouths. The largest of all fish, the whale shark, is a filter feeder and it feeds on phytoplankton, one of the smallest organisms in the ocean. Sardines also feed on phytoplankton and small zooplankton.
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For fish, those animals with gills, water is as good as air for us. ... In front of the gills are bony structures called gill rakers. These structures are like combs that filter the water for food like microscopic plankton or larger prey. This food is then shunted towards the esophagus, where the digestive process begins.
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