Chaetoceros
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Chaetoceros is a genus of diatoms in the family Chaetocerotaceae, first described by the German naturalist C. G. Ehrenberg in 1844. Species of this genus are mostly found in marine habitats, but a few
Phytoplankton – such as this colony of Chaetoceros socialis – naturally give off fluorescent light as they dissipate excess solar energy that they cannot consume through photosynthesis.
Diatoms through the microscope
Calothrix
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Calothrix is a genus of cyanobacteria. They are generally found in freshwater.
