chosen as they are the dominant species in the subtidal area of the study area (Jiang et al., 1996), and previous study has demonstrated its capacity for fast growth thus may have good bioremediation potential (Yu et al., 2013b). These algae also have some commercial values as raw material for phycocolloid and as fodder for holothurians, urchins, abalones, and winkles. To fulfill the