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Family Sargassaceae

HAWAII

Sargassum polyphyllum  

Makapu'u intertidal, Oahu

 

 

Haleiwa Trench, Oahu, 3 feet

VARIABLE SARGASSUM

Abundant forming extensive meadows on hard reef.  Narrow wrinkled blades with spiny stems and spherical gas bladders.  Endemic to Hawaii.