Abstract: Pleurochrysis dentata is a new record species of red tide algae in China. Batch culture characteristics, movement modes and reproduction modes were investigated in the paper. The results show that obvious regular changes of the medium color during batch culture were observed, that is, brown in exponential phase while milky white in decline phase, and two colors belong to cell itself and the calcium shells separately. The movement mode is revolving swimming and the asexual reproduction mode is producing autospore. Biological characteristics of P. dentata are important foundation for its study on ecology and the effective controlment.

Key words: Pleurochrysis dentata, movement mode, reproduction mode, culture characteristics