Following isolation, a total of 96 isolated strains were pre- screened via NR fluorescence of cellular neutral lipid and epi- fluorescence microscopy. Isolates were inoculated into Guillar f/2 or Walne medium. Almost all isolates grew robustly in f/2 medium. However, the growth of motile and flagellate micro- algal isolates, e. g. strain 45 and 50, was promoted in Walne medium and exhibited a strong neutral lipid fluorescence when stained with Nile red. During cultivating, a number of isolates could not survive due to challenges in culture accli- mation. Isolates that grew rapidly and manifested strong yellow-gold fluorescence from NR stained cells (i.e. reflecting a relatively high neutral lipid content) were further screened. A total of 21 strains of the 96 isolated microalgae were suitable for further characterization, and results are shown in Table 2.