Bernice Puahi Bishop Museum · CC BY-NC · GBIF · full resolution
Sargassum polyphyllum
As recorded: Sargassum polyphyllum J.Agardh, 1848
Chromista › Ochrophyta › Phaeophyceae › Fucales › Sargassaceae
- Collected by
- Hau, S.; Oishi, F.Skippy Hau →Francis G. Oishi →
- Collector number
- IA 21002
- Date
- September 9, 1992
- Locality
- E Waikahalulu Bay
- Island
- Kahoʻolawe
- Region
- Hawaii, United States
- Record type
- Preserved specimen
Collected the same day
On September 9, 1992, Hau, S.; Oishi, F. also collected 24+ other specimens.
Sargassum polyphyllum observed alive in Hawaiʻi
This specimen was collected in 1992. Since 2000, iNaturalist observers have recorded 34 research-grade sightings in the wild, most recently on 2026-10-08.

2026-10-08
Kalakaua Ave, Honolulu, HI, US
(c) jordan loftin, some rights reserved (CC BY-NC)

2026-10-07
N Kalaheo Ave, Kailua, HI, US
(c) anemoneme, some rights reserved (CC BY-NC)

2026-10-06
Lualualei Homestead Rd + Pokai Bay St, Waianae, HI 96792, USA
(c) maddy_wilkens, some rights reserved (CC BY-NC)

2025-12-15
Mamala Bay, Honolulu, HI, US
(c) William Wimley, some rights reserved (CC BY-NC)

2025-12-06
Diamond Head / Kapahulu / St. Louis Heights, Honolulu, HI, USA
(c) belyykit, some rights reserved (CC BY-NC)

2025-11-08
Waikiki, Honolulu, HI 96815, USA
no rights reserved
Observations and photos from iNaturalist, shown only when openly licensed.
Cite this specimen
Sargassum polyphyllum. BISH 700828. Bernice Pauahi Bishop Museum, Honolulu. GBIF occurrence 5956311518. Accessed via explore.bishopmuseum.org/specimens/bish/700828.
Record sources
- GBIF occurrence 5956311518 ↗
- Data license: CC_BY_NC_4_0
- Last harvested October 26, 2026
