Knotted wrack (Ascophyllum nodosum)
Many people think of seaweeds as simply plants that live in the sea. While many types of seaweed do have structures resembling the roots, stems and leaves of plants, and seaweeds do photosynthesize, technically seaweeds fall into an entirely different kingdom: Protista. Often referred to more scientifically as marine algae, seaweeds lack the specialized tissues found in plants responsible for transporting food and water. In most field guides, seaweeds are divided into three main groups: green, brown and red. These…