The marine world is a universe in its own. It has its own rules of life and death, and many of its resources are still left undiscovered. Marine algae, although representing only a small part of the abundance of underwater species, contain important active ingredients which are becoming more and more exploited in medicine, pharmacology and nutrition. This book presents the results of a survey conducted along the Lebanese coast in order to determine the different algae species growing there. It gives a general overview of algae species, their modes of reproduction, contents in active ingredients and drying method importance as well as present medical, pharmaceutical and nutritional uses. It provides data on each of the discovered species, illustrated in high definition, along with information on locations and periods of growth. This book targets academics, researchers and curious readers, and it is still the only available reference on marine algae growing on the Lebanese coast.