Why does blue lagoon give people a horrible feeling?

The blue is too deep, and there is a feeling that people will sink in. Blue eyes like Persian cats feel terrible and make people feel insecure psychologically. In addition, the Great Lakes have made people who are afraid of water even more afraid. In fact, this is a psychological effect. Once people leave the land, they will have a sense of nothingness without concentration. Water, sky and sea make people feel insecure on land. However, it also varies from person to person.