Lethrinus semicinctus 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Perciformes Lethrinidae

Scientific Name: Lethrinus semicinctus Valenciennes, 1830
Common Name(s):
English Black-Spot Emperor, Black Blotch Emperor, Reticulated Emperor, Semicinctus Emperor
French Empereur Maillé
Spanish Emperador de Malla
Taxonomic Source(s): Eschmeyer, W.N., Fricke, R. and Van der Laan, R. (eds). 2016. Catalog of Fishes: genera, species, references. Updated 29 September 2016. Available at: (Accessed: 29 September 2016).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2015-03-09
Assessor(s): Carpenter, K.E., Lawrence, A. & Myers, R.
Reviewer(s): Ralph, G. & Linardich, C.
Facilitator/Compiler(s): Ralph, G.
Lethrinus semicinctus is widely distributed, common and locally abundant in parts of its range. It is fished throughout its range; however, it appears to be of generally minor commercial importance. There are indications of localized population declines, but declines on a global level are not suspected. It is assessed as Least Concern.

Geographic Range [top]

Range Description:Lethrinus semicinctus is found in the East Indian Ocean and West Pacific, including Sri Lanka, Indonesia, northern Australia, the Ryukyu Islands to the Marshall and Solomon Islands (Carpenter 2001). It has also been reported from Fiji (Seeto and Baldwin 2010, R. Myers pers. comm. 2015). It is found to depths of at least 40 m (Allen 2006, Allen and Erdmann 2012).
Countries occurrence:
Australia; Brunei Darussalam; China; Disputed Territory (Spratly Is.); Fiji; India; Indonesia; Japan; Korea, Republic of; Malaysia; Marshall Islands; Micronesia, Federated States of ; Nauru; New Caledonia; Palau; Papua New Guinea; Philippines; Solomon Islands; Sri Lanka; Taiwan, Province of China; Timor-Leste; Vanuatu
FAO Marine Fishing Areas:
Indian Ocean – eastern; Pacific – northwest; Pacific – western central
Additional data:
Lower depth limit (metres):35
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Lethrinus semicinctus is a minor component of the vertical dropline (between 120 and 180 m) and bottom handreel (depths of 20 to 100 m ) catch in off the New Ireland Province of Papua New Guinea. It is the least common lethrinid recorded from this fishery (Watt 1999). This species was not among the 30 most abundant species captured by beach seine in seagrass beds in Wakatobi Marine National Park, Indonesia (Unsworth et al. 2007). This species is not typically targeted in Great Barrier Reef hook and line fisheries, however it is among the most abundant non-targeted species in this region (Mapleston et al. 2008). This species has not been recorded from Great Barrier Reef since 2004, but generally very low abundance in the 10 years prior.

It has a low to moderate occurrence in Fiji and rare from Solomon Islands. The density of this species from Fiji was shown to be 0.9/ha (S. Jupiter, unpublished data; Allen 2006).

This species is incidentally exploited in the Philippines and is becoming much less common in markets (K. Carpenter pers. comm. 2015).
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:Lethrinus seimicinctus inhabits shallow seagrass beds, reef flats, lagoons and sandy areas near coral reefs. This species feeds on benthic invertebrates and small fishes. This species reaches a maximum total length of about 35 cm total length (Carpenter 2001). The mean size of individuals taken in the dropline fishery off Papua New Guinea was 27 cm standard length (Fry et al. 2006). Individuals ranging in size from 3.7 to 10.5 cm were collected in a small, human impacted mangrove creek in the Philippines (Abrogueña et al. 2012).

Use and Trade [top]

Use and Trade: This species is a minor component of fisheries throughout its range. It is caught by shore seine, trawl, trap and handline. It is marketed fresh (Carpenter 2001). It is taken in fisheries in Fiji (Jennings and Polunin 1995). This species is a minor component of the vertical dropline (between 120 and 180 m) and bottom handreel (depths of 20 to 100 m ) catch in off the New Ireland Province of Papua New Guinea. It is the least common lethrinid recorded from this fishery (Watt 1999). It is a commercially  valuable species, however it is not directly targeted in the deepwater fisheries off the Lihir Island group, Papua New Guinea (Fry et al. 2006). It is also fished in the Solomon Islands (Goto 1996). It is not consistently retained by the commercial fishery in Torres Straight reef line fishery, and was sometimes discarded as bycatch and/or retained for subsistence (Williams et al. 2008). Lethrinids are dominant features of fish landings in many parts of the Pacific. In Oceania, lethrinids are components of reef and lagoon and deep-slope species stocks, and are sometimes taken with small pelagics. Lethrinids are the main targeted reef fish species in Fiji. Commercial hand-line fishing primarily targets lethrinids in Guam in waters less than 150 m. Lethrinids are landed using hand-lines, spears, surrounding nets, and drive-in nets, and occasionally using spears and beach seines (Dalzell et al. 1996).

Threats [top]

Major Threat(s): This species is a component of fisheries throughout its range, but this is not currently a major threat to its global population.

Conservation Actions [top]

Conservation Actions: There are no known species-specific conservation measures.

Citation: Carpenter, K.E., Lawrence, A. & Myers, R. 2016. Lethrinus semicinctus. The IUCN Red List of Threatened Species 2016: e.T16720537A16722330. . Downloaded on 15 October 2018.
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