Home > Marine > Seaweeds > Brown Seaweeds > Sargassum obtusifolium

Updated 8/11/2025

Family Sargassaceae

TROPICAL & TEMPERATE PACIFIC / HAWAII

Sargassum obtusifolium

Mokuleia tidepool, Oahu

 

 

Makapu'u tidepool, Oahu

 

RIBBON SARGASSUM

Abundant on reefs exposed to wave action during winter.  Blades are thin, narrow, and elongated.  Indonesia to Micronesia, Hawaii, Polynesia and west coast of South America.