What is yellow wrack?

Yellow wrack, scientifically known as Ascophyllum nodosum, is a type of brown seaweed commonly found along the Atlantic coasts of North America and Europe. It is characterized by its distinctive yellowish-green color and knobby air bladders that help keep it buoyant in the water. This seaweed is often used as a natural fertilizer and in animal feed due to its high nutrient content. Additionally, yellow wrack plays a vital role in coastal ecosystems by providing habitat and food for various marine species.