Lutjanus monostigma

Onespot Snapper | Black Spot Snapper | Onespot Seaperch
Lutjanus monostigma
Lutjanus monostigma, Raja Ampat, Indonesia, Photo: Andrew Green
Lutjanus monostigma
Lutjanus monostigma, Red Sea, Photo: Rick Stuart-Smith
Lutjanus monostigma
Lutjanus monostigma, (Night Phase) Cook Islands, Photo: Graham Edgar
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Lutjanus monostigma
Lutjanus monostigma
Lutjanus monostigma


Temperate Australasia, Tropical Indo-Pacific


Pale grey body, bright yellow fins, usually with a black spot two-thirds distance along body which decreases in size and becomes more rectangular with age. Lacks stripes of other black marked snappers L. ehrenbergii (Ehrenberg's Snapper) or L. fulviflamma (Blackspot Snapper) and has a yellow tail unlike L. russellii (Moses' Snapper).


Max Size: 60 cm

Sea Temperature Range: 23.3-31.5°C

Depth: 1-60 m

Habitat Generalization Index: 4.36

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: Not Evaluated

Occurrence: Infrequent (5.8% 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 (7 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