Lethrinus semicinctus

Blackblotch emperor
Characteristic features:

Brownish with small dark blotches, larger dark blotch below lateral line under soft portion of dorsal fin, fins reddish.


Up to 35 cm TL.


East Indian & West Pacific, in tropical waters.


Shallow coastal habitats and coral reefs, from 4 to 35 m depth.


Feeds on benthic invertebrates and small fishes.

Indonesian fisheries:

Caught by shore seine, trawl, trap, and handline.

Similar species:

Lethrinus ravus
Drab emperor

Lethrinus ravus

Lethrinus ravus differs in having no large black blotch on sides (vs. a large, irregular black blotch on sides) and 6–10 scales in supratemporal patch (vs. 4–7).

Lethrinus harak
Thumbprint emperor

Lethrinus harak

Lethrinus harak differs in having inner surface of pectoral-fin base densely covered with scales (vs. naked) and a singular, diffuse black blotch on sides below mid dorsal fin (vs. numerous small dark blotches and a larger dark blotch on sides below soft dorsal-fin rays).

Lethrinus variegatus
Slender emperor

Lethrinus variegatus

Lethrinus variegatus differs in having no black blotch on sides (vs. numerous small dark blotches and a larger dark blotch on sides).

External links: