AlgaeWords by Emily Rodriguez. Photos by Kayla Feairheller. Giant Kelp Sargassum Horneri aka. Japanese wireweed Oar Kelp Woody Kelp Bull Kelp Bull Kelp aka. Nereocystis luetkeana Woody Kelp aka. Pterygophora californica Oar Kelp aka. Saccharina latissima Giant Kelp aka. Macrocystis pyrifera