Diana's hogfish

Of moderate size, Diana's hogfish reaches about 17 cm in standard length. Its laterally compressed body is armed with prominent canine-like teeth, typical of benthic predators.

The species exhibits marked ontogenetic color dimorphism. The juvenile displays high-contrast coloration: a slightly reddish black body covered with white spots. As adults, this juvenile coloration fades into a more uniform pink to orange coloration, sometimes enhanced with a fine light lanceolate line on the flanks. The head and fins are of matching hues, blending with the coral substrate.

Restricted to coral reefs, Diana's hogfish plays a major ecological role as a cleaner fish, a function primarily carried out by juveniles. Unlike sedentary cleaner gobies, the juvenile is mobile: actively patrolling over several meters, sometimes rising a meter above the seabed to solicit neighboring fish. They establish cleaning stations under overhangs, cave ceilings, or sheltered spots among gorgonians and corals.

Adults, less involved in this symbiosis, move in pairs or small mobile groups, swimming in the water column near the reefs.

This benthic carnivore primarily feeds on invertebrates such as crustaceans and mollusks, dislodging them from crevices with its robust teeth.

Juveniles' diet is supplemented by specific cleaning activity: they consume ectoparasites (copepods, isopods) extracted from the skin, gills, and oral cavity of other fish species. This opportunistic behavior provides them with a constant source of protein-rich food while providing a health service to the reef community.

Reproduction follows the classic pattern of pelagic reef species: during favorable periods, couples release their gametes into the open water. The eggs, and subsequent larvae, drift with ocean currents, evading reef predators. After a pelagic phase, the larvae metamorphose and settle on the seabed to adopt a benthic lifestyle and the characteristic cleaning behavior of juveniles.