Milford Sound is a deep, glacier-carved fiord located in the southwestern part of New Zealand’s South Island. The water in Milford Sound is known for its dark, inky color, which is caused by the presence of tannins leached from the surrounding forests. The depth of the water in Milford Sound varies depending on the location and the tides, but in general, it is one of the deepest fiords in the world.
The deepest part of Milford Sound is known as the Deep Water Basin, which is located near the entrance of the fiord. The depth of the water in the basin can reach up to 265 meters (869 feet). In other parts of the fiord, the depth of the water ranges from around 20 meters (66 feet) to over 100 meters (328 feet).
The depth of the water in Milford Sound is due to the fact that it was carved by glaciers during the last Ice Age. As the glaciers moved down the valleys, they scoured out the rock and created deep troughs in the landscape. When the glaciers retreated, the troughs filled with water, creating the fiords that are now found throughout the southwestern part of New Zealand’s South Island.
Today, the deep, dark waters of Milford Sound provide an ideal habitat for a variety of marine life, including dolphins, seals, and various species of fish and shellfish. The unique underwater environment of the fiord is a popular destination for scuba diving and other water-based activities, offering visitors a chance to explore the hidden depths of this stunning natural wonder.