Fifty-eight muricid species were collected during recent expeditions to Fiji, including 3 new species. A review of the literature added another 37 species reliably recorded from the archipelago, bringing the total muricid fauna of Fiji to 95 species. Twenty-five species, including 14 shared with Fiji, are reported from Tonga. Bouchetia n. gen. is described for Poirieria (Paziella) vaubanensis Houart, 1986, originally described from New Caledonia and now recorded from Fiji. Conchatalos spinula n. sp. and Prototyphis gracilis n. sp. are described from Fiji; Murexsul merlei n. sp. is described from Fiji and Tonga. Attiliosa caledonica (Jousseaume, 1881), formerly treated as a synonym or subspecies of Attiliosa nodulifera (Sowerby, 1841), is recognized as a valid species, as both species co-occur in Fiji without intermediates. Pascula ambonensis Houart, 1996, Tritonidea lefevreiana Tapparone Canefri, 1880 and Pentadactylus paucimaculatus Sowerby, 1903 are reclassified in Cytharomorula Kuroda, 1953.Citation:  Southwestern Pacific OBIS (2014). Muricidae (Mollusca: Gastropoda) from Fiji and Tonga. Southwestern Pacific OBIS, National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand, 277 records.Online:  http://nzobisipt.niwa.co.nz/resource.do?r=muricidae_fiji_tonga  Released on June 10, 2014.Bibliographic Citation:  Houart, R. & Héros, V. 2008. — Muricidae (Mollusca: Gastropoda) from Fiji and Tonga, in Héros, V., Cowie, R. H. & Bouchet, P. (eds), Tropical Deep-Sea Benthos 25. Mémoires du Muséum national d’Histoire naturelle 196: 437-480. Paris ISBN: 978-2-85653-614-8. Houart & Héros (2008)