Foxface rabbitfish

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Foxface rabbitfish
Siganus vulpinus 2.jpg
Adult, day color
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Siganidae
Genus: Siganus
Species: S. vulpinus
Binomial name
Siganus vulpinus
(Schlegel & Müller, 1845)

Amphacanthus vulpinus Schlegel & Müller, 1845
Lo vulpinus (Schlegel & Müller, 1845)

The foxface rabbitfish (Siganus vulpinus) is a saltwater aquarium fish. It belongs to the rabbitfish family (Siganidae) and is sometimes still placed in the obsolete genus Lo. Other common names are foxface or foxface lo, but these properly refer to any of the rabbitfish species once separated in Lo, e.g. the closely related[1] bicolored foxface (S. uspi). The foxface rabbitfish lives throughout the western Pacific, often inhabiting coral reefs.[2]

The blotched foxface (S. unimaculatus) differs from S. vulpinus in possessing a large black spot below the aft dorsal fin. It is sympatric and not phylogenetically distinct, and though these two might be recently evolved species, they are more likely just color morphs and ought to be united under the scientific name S. vulpinus.[3]


Prague sea aquarium
Caulerpa crassifolia is a popular food of the foxface rabbitfish.

Siganus vulpinus is omnivorous, eating mostly algae and zooplankton.[4] From time-to-time, if hungry, it may nip at corals, such as Zoantharia (zoanthids and button polyps). Though not an obligate herbivore, the foxface rabbitfish does require algae in its diet. In captivity, it can usually be coaxed into eating a combination of mysis shrimp, sheets of dried seaweed, and marine flake food containing algae. It is popular with aquarists due to its appetite for feather caulerpas (Caulerpa crassifolia, C. mexicana, C. sertularoides), macroalgae that commonly overgrow the rockwork in home aquaria. S. vulpinus is highly skilled at removing this alga and will generally clear an aquarium of it within a matter of days.


  1. ^ Kuriiwa et al. (2007)
  2. ^ FishBase (2008)
  3. ^ Kuriiwa et al. (2007), FishBase (2008)
  4. ^ Lougher, Tristan (2006). What Fish?: A Buyer's Guide to Marine Fish. Interpet Publishing. p. 118. ISBN 0-7641-3256-3. Wild specimens feed primarily on algae and zooplankton.