Lethrinus genivittatus

Threadfin Emperor | Lance Emperor | Lancer | Longspine Emperor | Lethrinus nematacanthus
Lethrinus genivittatus
Lethrinus genivittatus, QLD, Australia, Photo: Rick Stuart-Smith
Lethrinus genivittatus
Lethrinus genivittatus, juvenile, NSW, Australia, Photo: Ian Shaw
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Lethrinus genivittatus
Lethrinus genivittatus


Tropical Indo-Pacific


Highly variable in colour and markings, which can change rapidly. Often mottled tan or brown with dark and pale blotches and stripes, and darker squarish blotch on body, level with eye under 3rd and 4th spine of dorsal fin. Extended 2nd dorsal spine.


Max Size: 25 cm

Sea Temperature Range: 17.9-30.3°C

Depth: 5- 25m

Habitat Generalization Index: N/A

Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.

Conservation and Rarity

IUCN Status: Least Concern

Occurrence: Infrequent (1.0% of sites)

Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed

Abundance: Several (5 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.

Edit by: RD Stuart-Smith, GJ Edgar, AJ Green, IV Shaw. 2015. Tropical Marine Fishes of Australia. Reed New Holland