What happens when fresh water meets with salt water?

On my way to Maple Bay, British Columbia, Canada (Turtle Island) ~ 🐢 🏝️ This summer, I travelled by ferry to Nanaimo, BC, to explore geodesic dome home living. On the way, I got to see what happens when fresh water and salt water meet. #Shelter #CannonCanyon #BritishColumbia #BC #BeautifulBritishColumbia #ExploreBC #BCFerries #Summer2021 #Seawater #FraserRiver #StraitOfGeorgia #Estuary