Prop Deacon Manu, who has played more than 100 matches for the Scarlets since moving to Wales from New Zealand in 2006, will lead the team.
Fiji will play in Pool D along with South Africa, Wales, Namibia and Samoa, with the top two teams progressing to the quarter-finals.
Meanwhile, Fataiki was celebrating as Fiji claimed the Punjas Series against Tonga - and new Worcester team-mate Aleki Lutui - on Friday night.
In the end despite going down 32-20 the Flying Fijians claimed the Series by a greater differential of a mere three points over the two games.
Fiji World Cup squad:
Forwards:Campese Ma'afu, Deacon Manu (captain), Setefano Somoca, Waisea Daveta, Viliame Veikoso, Tuapati Talemaitoga, Sunia Koto, Seko Kalou, Leone Nakarawa, Wame Lewaravu, Rupeni Nasiga, Dominiko Waqaniburotu, Sisa Koyamaibole, Akapusi Qera, Netani Talei, Masi Matadigo, Malakai Ravulo.
Backs:Nemia Ranuku, Vitori Buatava, Waisea Luveniyali, Seremaia Bai, Nicky Little, Albert Vulivuli, Gabirieli Lovobalavu, Ravai Fatiaki, Vereniki Goneva, Napolioni Nalaga , Michael Tagicakibau, Kini Murimurivalu, Iliesa Keresoni