Kelp is not a plant, so it doesn't have roots. The organism attaches its holdfast to a rock, it can be dislodged and washed up on the beach during strong storms.
These brown algae grow on rocks near the shoreline. It is possible to see them exposed at low tide. They look like small brown trees growing on the rocks. These washed up on a beach in California.
We thought it was interesting how this Sea Palm had attached its holdfast to a Blue Mussel! It had washed up on the beach. Most solid substrates in the low tide zone have some type of organism living on them, even organisms can have something living on them! This is an edible seaweed.
