Macrocystis, Zostera, Egregia and Phyllospadix jumble together to form this large "kelp paddy" drifting freely on the open ocean. Kelp paddies harbor many small invertebrates, the provide shelter for numerous fish and pinnipeds. Birds often rest on paddies on the high seas. And many species of seaweeds continue to produce spores and potentially colonize new habitats downstream from their original home attached to the sea floor. Kelp also played a major role in the migration and success of prehistoric humans.