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Halimeda opuntia - Halimeda opuntia
Photo by James Watt

Halimeda opuntia has many branched clumps of disk-shaped segments ranging in color from dark green to yellowish-green. Halimeda typically spreads laterally and often covers reefs, rocks, and sand. It normally grows between 3-150 feet deep.

Halimeda opuntia
(Halimeda opuntia)

Tropical and sub-tropical waters worldwide

Coral and rocky reefs and sand bottoms



The status of this species is representative of the populations within the waters of this Sanctuary only, not global populations.

Quick Fact
Fragments of Halimeda segments are a major contributor of calcium carbonate to the reefs and sand.

Learn More
- Northwestern Hawaiian Islands Education Project
- University of Hawaii Botany