Microscopic
observation of random samples after centrifugation assured that the samples were free from any other algae as well as
phytoplankton contaminations which were supported by earlier researchers that the Euglena blooms occur at higher temperature,
lower dissolved oxygen and acidic environment with higher nutrient concentration which have significantly inhibit the growth of
other algal species and phytoplankton [31-35]. Identified characters of E. tuba was given in