Incheon isnt notorious for wonderful seashores but there are a few shorelines to go looking for shellfish, swim, and many do have a great watch so long as the tide is significant. Incheons seashores are generally much more recognized for their muddy flats, but it can make for good areas https://felixeaun0.blogkoo.com/the-fact-about-spring-that-no-one-is-suggesting-46228374