Harmful algal blooms (HABs), one of global marine environmental problems, has serious impacts on the marine ecosystem balance and lead to enormous economic losses, which make it a pressing topic in marine science. The qualitative and quantitative detection for HABs species is the basis in HABs study. Besides the traditional microscopic method, more and more new techniques, such as flow cytometer and microscope (FlowCAM), chemotaxonomy, spectrofluorimetry for algal classes, oligonucleotide probes and immunoa...