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Individuals or colonies of
diatoms are generally free floating in the water column. These photosynthetic
organisms are prolific producers, and are one of the most important food sources for many
aquatic animals. One notable physical trait of diatoms is that most species display
strong radial symmetry. Although there are thousands of different species of diatoms
inhabiting nearly every water body on the planet, this guide will focus on those that live
in Chesapeake Bay and its tributaries.
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