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Updated 8/11/2025

Family Sargassaceae

INDO-WEST PACIFIC / HAWAII

Sargassum polyphyllum

Makapu'u intertidal, Oahu

 

 

Haleiwa Trench, Oahu, 3 feet

 

Kaloko, Oahu

 

VARIABLE SARGASSUM

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