Siganus fuscescens

Black Rabbitfish, Happy Moments | Black Rabbitfish | Black Spinefoot | Dusky Rabbitfish | Fuscescens Rabbitfish | Fuscous Rabbitfish | Fuscous Spinefoot | Mottled Spinefoot | Pearl-spotted Spinefoot | Pearly-spotted Rabbitfish | Pin-spotted Spinefoot | Stinging Bream | Siganus margaritiferus | Siganus nebulosus
Siganus fuscescens
Siganus fuscescens, Coffs Harbour, NSW, Photo: Ian Shaw
Siganus fuscescens
Siganus fuscescens, (Night Phase) WA, Australia, Photo: Graham Edgar
Siganus fuscescens
Siganus fuscescens, Noosa, QLD, Photo: Andrew Green
Siganus fuscescens
Siganus fuscescens, QLD, Australia, Photo: Rick Stuart-Smith
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Siganus fuscescens
Siganus fuscescens
Siganus fuscescens
Siganus fuscescens


Temperate Australasia, Temperate northern Pacific, Tropical Indo-Pacific


Variable pattern of spots and blotches across the sides and a large black blotch usually present behind the top of the gill cover. Similar S. argenteus (Forktail Rabbitfish), has distinctly forked tail.


Max Size: 40 cm

Sea Temperature Range: 16.2-31.2°C

Depth: 1-50 m

Habitat Generalization Index: 15.65

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: Frequent (10.5% 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: Many (16 per transect)

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

Edit by: GJ Edgar. 2008. Australian Marine Life. New Holland, Sydney