The students will systematically learn the "relationship between the marine environment and the species living in the environment". The student will develop a feel for coolly understand and make decisions concerning various marine environmental problems of which species are factors. The course will present how the marine environment is related to species in relation to various marine issues from global warming to red tide and the preservation of species in tidal flats. In order to avoid simply providing a series of information, the course will be conducted in the fifth and later classes in the framework of life or death in the marine ecosystem.