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Halimeda opuntia in life — In life — watercress alga, photographed by an iNaturalist observer, not this specimen. (c) 2006 California Academy of Sciences, some rights reserved (CC BY-NC-SA)

BISH 455814Botany

Halimeda opuntia

watercress alga

As recorded: Halimeda opuntia (L.) J.V.Lamour.

Plantae › Chlorophyta › Ulvophyceae › Bryopsidales › Halimedaceae

Collected by: Graham, J.
Collector number: 14
Date: November 1, 1928
Locality: Cook, Mangaia
Island: Raiatea
Region: French Polynesia
Identified by: Tsuda, R.T.
Record type: Preserved specimen

903 Bishop specimens of Halimeda opuntia · collected 1902–2016Species page ›

Halimeda opuntia observed alive

This specimen was collected in 1928. Since 2000, iNaturalist observers have recorded 25 research-grade sightings in the wild, most recently on 2026-04-27.

Halimeda opuntia observed 2026-04-27

2026-04-27

Curaçao

(c) emmaalves, some rights reserved (CC BY-NC)

Halimeda opuntia observed 2025-05-07

2025-05-07

Pigeon Island, Sri Lanka

(c) Linda, some rights reserved (CC BY-NC)

Halimeda opuntia observed 2025-05-03

2025-05-03

(c) Sue, some rights reserved (CC BY-NC)

Halimeda opuntia observed 2024-12-29

2024-12-29

El Qoseir, Red Sea Governorate, Egypte

(c) Marleen Schouten, some rights reserved (CC BY-NC)

Halimeda opuntia observed 2024-01-03

2024-01-03

Fisherman's Rock, North Sound, Grand Cayman

(c) spirula, some rights reserved (CC BY-NC)

Halimeda opuntia observed 2023-09-13

2023-09-13

Bonaire, Lac Bay, Caribbean Netherlands

(c) Jay Brasher, some rights reserved (CC BY)

Observations and photos from iNaturalist, shown only when openly licensed.

Cite this specimen

Halimeda opuntia. BISH 455814. Bernice Pauahi Bishop Museum, Honolulu. GBIF occurrence 5956535962. Accessed via explore.bishopmuseum.org/specimens/bish/455814.

Record sources

GBIF occurrence 5956535962 ↗
Data license: CC_BY_NC_4_0
Last harvested October 26, 2026