Yes, kelp is a marine algae. Of course it has roots. There is a Chinese medicine called kelp root. Look at the kelp root in the picture.

The function of kelp root is introduced. Kelp root? (Fujian Medical Health)? The source is the root of Laminaria japonica, a plant of Laminariaceae. ? The plant morphology is detailed in kelp strips. ? Collect that kelp harvested in sum and autumn, cutting off the roots during proces, and drying in the sun. ? Function Indications-The effect of kelp root can cure chronic tracheitis, cough, asthma, hypertension and dizziness.