The tangle is the largest kelp species in Iceland. It can grow up to five meters in length and up to 20 years old. It has a long leafless stem and a large blade at the end of the stem that divides into many parts. The stalk is big and strong and forms most of the “trees” in the kelp forests. The stem is often covered with other smaller algae or sessile animals.
The tangle is found all around Iceland and is prevalent in many places on rocky bottoms. It is found at depths of down to 30 meters if the sea is sufficiently clear. Abroad, it is found off the coast of Europe from Portugal to the Northern Norway.