Monster Seaweed

Giant kelp can grow up to 2 feet per day and reach a height of 175 feet. Kelp forests are found along the open coasts of North and South America, where seawater flows over the kelp's leaflike blades, providing nutrients. Sea creatures in live in every part of the forest, from the canopy at the surface to the rootlike holdfasts that anchor the kelp to the ocean floor.Believe It or Not!: Giant Kelp forests might not exit if it weren't for sea otters. Why? The otters eat sea urchins, which feed on giant kelp and, if not kept under control, could destroy an entire forest.