In this book, the authors present current research in the study of the biology, geographical distribution and economic importance of dinoflagellates. Topics discussed in this compilation include the distribution, toxicity and impact on aquaculture dynamics of toxic dinoflagellates' blooms in the austral pacific region; an overview of the ecophysiology, molecular biology, and ecological impacts of the toxic bioluminescent dinoflagellate pyrodinium bahamense; and dinoflagellates of the Baikal Region.