Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Hydrocharitales Hydrocharitaceae

Scientific Name: Halophila sulawesii
Species Authority: J.Kuo
Common Name(s):
English Species code: Hy, Species code: Hf
Taxonomic Notes: Halophila sulawesii is a very newly described species (Kuo 2007), with no genetic information.

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2010
Date Assessed: 2008-03-15
Assessor(s): Short, F.T.
Reviewer(s): Livingstone, S., Harwell, H. & Carpenter, K.E.
This is a newly described species. There is very little information on this species and it is recommended that research be carried out on its distribution and ecology, and that monitoring of the population is put in place. This species is listed as Data Deficient. There is a possibility that this species may be threatened due to its very restricted distribution.

Geographic Range [top]

Range Description:Halophila sulawesii is known only from several reef islands of the Spermonde Archipelago in southwestern Sulawesi, Indonesia (Kuo 2007).
Countries occurrence:
Indonesia (Sulawesi)
FAO Marine Fishing Areas:
Pacific – western central
Lower depth limit (metres):30
Upper depth limit (metres):10
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There is no population information for Halophila sulawesii, and the trends are unknown.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Halophila sulawesii has a similar vegetative appearance as Halophila ovalis, and has been reported as "deep water H. ovalis" in the literature. However, H. ovalis is a dioecious plant while H. sulawesii is a monoecious one, a feature resembling H. capricorni Larkum, that is the presence of a single male or female flower in separate floral axils of the same rhizome (Kuo 2007).  It is also a member of the Halophila decipiens complex.

Halophila sulawesii is found on coral sand between 10 and 30 m and grows adjacent to corals Seriatopora hystrix and Acropora sp. and other seagrasses such as Halophila decipiens and Halodule uninervis.

Threats [top]

Major Threat(s): The major threats to Halophila sulawesii are unknown. Possible threats include the degradation of habitat due to sedimentation and siltation from coastal development.

Conservation Actions [top]

Conservation Actions: There are no known conservation measures for H. sulawesii. Research is recommended for the general biology, taxonomy and threats to this species, and additional field studies are needed to investigate its precise distribution and reproductive biology (Kuo 2007).

Classifications [top]

9. Marine Neritic -> 9.4. Marine Neritic - Subtidal Sandy
suitability: Suitable  
9. Marine Neritic -> 9.8. Marine Neritic - Coral Reef -> 9.8.5. Inter-Reef Soft Substrate
suitability: Suitable  
9. Marine Neritic -> 9.9. Marine Neritic - Seagrass (Submerged)
suitability: Suitable  

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
In-Place Education
1. Residential & commercial development -> 1.2. Commercial & industrial areas
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation
  • 2. Species Stresses -> 2.2. Species disturbance

9. Pollution -> 9.3. Agricultural & forestry effluents -> 9.3.2. Soil erosion, sedimentation
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation
  • 2. Species Stresses -> 2.2. Species disturbance

1. Research -> 1.1. Taxonomy
1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats
1. Research -> 1.6. Actions
3. Monitoring -> 3.1. Population trends

Bibliography [top]

IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: (Accessed: 2 September 2010).

Kuo, J. 2007. New monoecious seagrass of Halophila sulawesii (Hydrocharitaceae) from Indonesia. Aquatic Botany 87(2): 171-175.

Citation: Short, F.T. 2010. Halophila sulawesii. In: The IUCN Red List of Threatened Species 2010: e.T173326A6991316. . Downloaded on 09 October 2015.
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