The longfin grouper (Epinephelus quoyanus), also known as the longfin rockcod, bar-breasted rock-cod, Gilbert's rock-cod, honeycomb rockcod, spotted groper or wirenet cod, is a species of marine ray-finned fish, a grouper from the subfamily Epinephelinae which is part of the family Serranidae, which also includes the anthias and sea basses.

The overall colour is whitish on the head, body and fins and it is marked with many sizeable closely set hexagonal to roundish dark brown to blackish spots.

[3] The longfin grouper was first formally described as Serranus quoyanus in 1830 by the French zoologist Achille Valenciennes (1794–1865) with the type locality given as New Guinea.

[4] The specific name honours the French naval surgeon, zoologist and anatomist Jean René Constant Quoy (1790–1869) who, with Joseph Paul Gaimard, reported this species.

Once caught the wild hatched juveniles are grown-out in cages in southeast Asia, albeit on a small scale.