The threespine grubfish (Simipercis trispinosa) is the only species in the monotypic genus Simipercis, part of the family Pinguipedidae.

[1] The species is endemic to waters off eastern Australia from Swain Reefs, Queensland, to Broken Bay, New South Wales.

[2] It is distinguished from other sandperch by having three spines in the dorsal fin.

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