Rhyacichthys guilberti is a goby belonging to the family Rhyacichthyidae.

[2] Its population on New Caledonia was estimated at less than 400 individuals,[2] but it is now thought to have been extirpated from that island, it remains common on Vanuatu.

[1] Rhyacichthys guilberti occurs in coastal streams with a relatively steep gradient set in hilly or mountainous terrain.

holding on in the fast current using its broadened pelvic and pectoral fins and its compressed head and snout.

[3] The specific name honours the French entomologist Eric Guilbert who was involved in collecting the type specimen.