Bristol have confirmed his signature from the end of this season.
Ratu Naulago says he never considered the prospect of playing for any other club in Rugby League, after switching codes to join Bristol Bears.
The Black and Whites revealed yesterday that Naulogo will depart at the end of the season and Bristol have confirmed his signature this morning.
Naulago thanked Hull for handing him an opportunity and said he has “too much respect for the club” to ever think about playing for another Super League team.
He said: “I would like to thank Hull FC for the opportunity they gave me in professional rugby – I will always be thankful for that. I have loved my time at the club and the fans have made me feel very welcome.
“I hadn’t considered playing anywhere else in rugby league. I have too much respect for the club and for what they have done for me, so leaving for another Super League team was never an option.
“I am fully committed to the club for the rest of this season when we do get back playing and I am determined to do my best for the team to finish on a high, it would be fantastic to try and win something with the club.”
He added: “Moving to Bristol means my wife and I will be close to family and friends also.”