The bay of fundy

Twice a day the Bay of Fundy puts on a magnificent show unrivaled anywhere else in the world. The largest tides carry water into the bay at a rate equivalent to all the rivers of the world. At the head of the bay the tides rise 53 feet (16 meters). It’s an extraordinary spectacle, complete with rip currents, seething upwellings, and violent whirlpools. At low tide the water can retreat as far back as three miles (five kilometers). A few hours later, over 50 feet (15 meters) of water inundates the area.
The reason for the high tides lies in the unique funnel shape and depth of the bay. The water moves in sync with the ocean tides outside, and the natural oscillation of water sloshing back and forth inside this basin corresponds exactly with the rhythm of the Atlantic tides. The result is “resonance” where the height of the incoming tide is reinforced by the oscillation of existing water in the bay. The phenomenal tides have left their mark on the bay. At Hopewell Rocks the tides have sculpted towering statues of red sandstone, and at St. Martin’s tidal action has carved enormous sea caves. The bay is also rich in nutrients, providing a wealth of food to eight species of whales, as well as thousands of shorebirds.