IntroductionHistorical view (marine biotechnology, micro and macro algae and cyanobacteria, marine habitats); Potentials and constraintsBiology of micro algaeTaxonomy; Photosynthesis; Autotrophic/mixotrophic/heterotrophic growth; Symbiosis; Extremophiles; Genetic Engineering; Special pathways and metabolisms (differences between plants, terrestrial and marine microorganisms)Applications and productsTechnically relevant strains; Micro algae; Macro algae; Feed and aquaculture; Nutrition; Cosmetics; Pharmaceutical products; Energy; Environment (aspects of CO2, waste water treatment and biosorption); Overview on the state-of-the-art of running industrial processes including economic aspectsEngineering and technical aspectsLight supply; Different technologies of photobioreactors; Open systems; Closed systems; Sterility; Downstream processing