Generally, phytoplankton exhibits high species diversity and wide range of variation which makes them most successful primary
producer in contemporary global oceanographic regimes. When compared to its counterpart of terrestrial ecosystem, phytoplankton
species diversity is twelve-fold lower, however, taxonomic divisions are eight times higher than terrestrial plants. Therefore, it
is important to investigate the detailed composition of phytoplankton and study their spatiotemporal distribution in the marine
environment. In the present review, we have assessed the detailed community composition of cormophytic phytoplankton with
their variability in the world oceans.