person who swims in a dirty sea in his dream is involved in some dubious business and pursues haram. These haram things can be property, as well as women. In other words, this dream can also mean committing adultery, looking at haram or being instrumental in this evil. If you swim in a polluted sea in your dream and then get out of it, it indicates that the evils you will encounter will come to an end and you will return from wrong ways and reach the right path.