Description: Fucus vesiculosus, known by the common names bladder wrack, black tang, rockweed, bladder fucus, sea oak, black tany, cut weed, dyers fucus, red fucus, and rock wrack is a seaweed found on the coasts of the North Sea, the western Baltic Sea, and the Atlantic and Pacific Oceans. It was the original source of iodine, discovered in 1811, and was used extensively to treat goitre, a swelling of the thyroid gland related to iodine deficiency. https://en.wikipedia.org/wiki/Fucus_vesiculosus

Description: Kelps are large brown algae seaweeds that make up the order Laminariales. Despite its appearance, kelp is not a plant; it is a heterokont. They are known for their high growth rate—the genera Macrocystis and Nereocystis can grow as fast as half a metre a day, ultimately reaching 30 to 80 metres (100 to 260 ft). (https://en.wikipedia.org/wiki/Kelp)