Longest seaweed

The world’s longest species of seaweed is the giant kelp Macrocystis pyrifera, which lives near rocky shores in California and elsewhere in the Pacific Ocean. The longest verified specimen measured 60 m (197 ft) in total length, but there are unauthenticated reports of even longer examples. Populations of Macrocystis, which means 'large bladder', occur in the north Pacific - from Alaska to cooler waters in Baja, California.