Biscayne National Park Intertidal and Subtidal

There are a number of tidal channels in Biscayne National Park. They can occur between islands or between shoals, and are especially abundant at the north end of the park in the area known as "The Safety Valve." Channels are a mixture of Bay and ocean water, affected by the ebb and flow of tides. There is regular turbulence and abundant food and oxygen supply with a salinity similar to the open ocean. Shoals are shallow areas with plenty of sunlight, frequent turbulence, current flow, and dense colonies of algae.

Taking the family for a backpacking trip has its ups and downs, but at least dinner doesn't have to be one of the...
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Featured Park
Rising above a scene rich with extraordinary wildlife, pristine lakes, and alpine terrain, the Teton Range stands monument to the people who fought to protect it. These are mountains of the imagination. Mountains that led to the creation of Grand Teton National Park where you can explore over two hundred miles of trails, float the Snake River or enjoy the serenity of this remarkable place.
Featured Wildlife
The pika is a close relative of the rabbits and hares, with two upper incisors on each side of the jaw, one behind the other. Being rock-gray in color, pikas are seldom seen until their shrill, metallic call reveals their presence.