techniques that are coupled with high frequency imaging Flow cytometry can be used to distinguish phytoplankton based on their size and pigments, and is especially useful for plankton smaller than 10μm. Recent [...] imaging flow cytometry now offer the ability for rapid measurement of a larger size spectrum of phytoplankton. Optical imagingmethods such as FlowCam, Imaging FlowCytobot, and ZooScan can rapidly photograph