species: Halimeda macroloba in Lizard Island area: all known taxa (Lizard Island Field Guide)
Halimeda macroloba

©Lyle Vail: Halimeda macroloba at 18 metres depth in Watson's Bay, Lizard Island

©Anne Hoggett: Halimeda macroloba at 17 metres depth in Watson's Bay, Lizard Island

©Anne Hoggett: Reproductive structures on Halimeda macroloba at Watson's Bay, Lizard Island, 17 metres depth, 30 Nov 2014
Kingdom Plantae
Division Chlorophyta
Class Ulvophyceae
Order Bryopsidales
Family Halimedaceae
Genus Halimeda
Species Halimeda macroloba



Distinguishing features

According to Littler and Litter (2003):

Erect plants to 23 cm high. Branches comprised of large flat segments that are generally oval in shape, to 3 cm long x 4 cm wide. Often segments are arranged in a single plane. Segment margins thickened, often rippled.


  • Size data has not been obtained.



Dr John Huismann of Murdoch University notes that Halimeda macroloba is the only Halimeda species in the Lizard Island region with big flat segments that grows in sand (pers. comm. Dec 2014).

by Anne Hoggett


©Atlas of Living Australia: Australian distribution

Local abundance

  • Lizard Island: Common

Web resources


References that assist with identification

  • Littler, D.S. and M.M. Littler (2003). South Pacific Reef Plants: A diver's guide to the plant life of South Pacific coral reefs. Offshore Graphics Inc, Washington DC, USA.

Other references

  • Christa, G., L. Wescott, T.F. Schaeberle, G.M. Koenig and H. Waegele (2012). What remains after 2 months of starvation? Analysis of sequestered algae in a photosynthetic slug, Plakobranchus ocellatus (Sacoglossa, Opisthobranchia), by barcoding. Planta, doi 10.1007/s00425-012-1788-6. LIRS catalog number 1548.
  • Price, I.A., A.W.D. Larkum and A. Bailey (1976). Appendix: Check list of marine benthic plants collected in the Lizard Island area, Australian Journal of Plant Physiology, 3: 3-8. LIRS catalog number 191.