It is clear that a variety of human factors, including habitat reduction and overfishing, contribute to the decline in the eel catch, but there is also the possibility that changes in the ocean atmospheric system are affecting eel ecosystems. Identification of eel spawning grounds requires an extensive ocean survey, and thorough monitoring of eel movement from habitat to spawning grounds is also necessary.

Most of the ocean waves we see by the shore are generated by wind. Ripples are generated when wind blows over the ocean surface, and they gradually grow through absorbing energy from the wind. The huge waves in the ocean can destroy coastal structures and capsize ships, so they have been the subject of study for many years. This article focuses on the genius scientists who developed modern study of ocean waves and clarified the complex property of ocean waves. In addition, I would like to retrace their backgrounds and research results to show the situation of studies during its developing stage.

Earth carries 8 billion people and all life coexisting with us; it is our precious ship that must continue its voyage into the future. At times, we run into situations where we fear for our lives aboard this ship. With every time, we need to help each other out to overcome the obstacles. Through marine environmental education, we hope to show children the importance of protecting the environment and pass on this dear ship, Earth, to the next generation.