Appearance
The blotched foxface 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''.
Food
''Siganus vulpinus'' is omnivorous, eating mostly algae and zooplankton. From time-to-time, if hungry, it may nip at corals, such as Zoantharia . 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 , 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.References:
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