Lethrinus olivaceus

Longnose Emperor | Adia | Longface Emperor | Longnose Pigface Bream
Lethrinus olivaceus
Lethrinus olivaceus, Cook Islands, Photo: Rick Stuart-Smith
Lethrinus olivaceus
Lethrinus olivaceus, North WA, Australia, Photo: Andrew Green
Lethrinus olivaceus
Lethrinus olivaceus, French Polynesia, Photo: Rick Stuart-Smith
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Lethrinus olivaceus
Lethrinus olivaceus
Lethrinus olivaceus


Tropical Indo-Pacific


Long snout and elongated grey/olive body with no distinctive markings. Swims actively high in the water. L. microdon (Smalltooth Emperor) has a slightly shorter snout, pale lines radiating forward from the eye and differs in scale count above lateral line.


Max Size: 100 cm

Sea Temperature Range: 23.8-31.3°C

Depth: 1-185 m

Habitat Generalization Index: 12.31

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: Frequent (11.3% 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: Few (3 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