Ochrophytes, in the phylum Ochrophyta, are a group of mostly photosynthetic stramenopiles (also called heterokonts), a clade of organisms distinguished by the presence of stiff tripartite external hairs.
Within this phylum, brown algae, comprising the class Phaeophyceae, constitute a large group of multicellular algae that includes many seaweeds of temperate and polar regions. They are dominant on rocky shores throughout cooler areas of the world, where they play an important role both as food and as a potential habitat.
Within the class Phaeophyceae, the order Fucales represents brown algae that lacks an independent sexual gametophyte. The sporophyte plants produce both male and female gametes directly. These fuse and form new sporophytes. Special fertile branches bear the gametes. The extruded eggs form tufts attached to the reproductive branches by mucuous threads. They are not washed away, which is an advantage considering that most of these species live in heavy surf.
