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Diet studies of age-0 freshwater drum have been limited to lakes and reservoirs, where they have been described as consuming
cladocerans, chironomid larvae, mayfly larvae, and occasionally larvae of other fishes (Swedburg and Walburg, 1970; Clark and Pearson, 1979; Bur, 1982).
Among the most common microscopic animals on the bluegill's menu are Daphnia, a type of
Cladoceran (larger zooplankton often called water fleas) that can grow to several millimeters and swim in small hopping motions.