These plants found here are called Giant Kelp. One plant can grow to 125 feet in length.
Kelps are large brown seaweed found in temperate oceans around the world.
However, kelps found on the Atlantic coast of the U.S. are much smaller than those found in the Pacific waters. Algae is a diverse group of non-vascular plants. This means that they do not have roots, stems, leaves or flowers, although they have similar looking structures. Holdfast - Unlike a root, the kelp's holdfast doesn't supply water and nutrients to the rest of the plant. A holdfast keeps algae in place so currents and tides don't wash the organism away.