Dominici passed away at the age of 48 on Tuesday, the French Rugby Federation (FFR) and the player's former club Stade Francais confirmed, with the cause of his death not yet revealed.
Toulon-born Dominici, who played at full-back and on the wing, won 67 caps for his country and scored 25 tries.
Everyone in Irish Rugby is thinking of our friends in @FranceRugby following the desperately sad news of Christophe Dominici's passing.— Irish Rugby (@IrishRugby) November 24, 2020
We're thinking particularly of Christophe's family, friends and former team-mates at this sad time. May he rest in peace. 🇫🇷 pic.twitter.com/AiCMTqurm9
Only Clerc (11) has scored more tries for France at a Rugby World Cup than the eight managed by Dominici, who made his debut for Les Bleus against England in 1998.
Clerc, who played 67 times for France, posted on Twitter: "Thank you Domi for everything you brought to French rugby and all these good times spent with you."
Really sad to hear Christophe Dominici has passed away, one of the best ever. Had some great nights out together after he’d taught me a lesson on the pitch #RIP— Austin Healey (@IamAustinHealey) November 24, 2020
Betsen earned many of his 63 caps alongside Dominici, and also tweeted: "Very very touched by this terrible and sad news of my playing brother Christophe Dominici. The inspiration and soul of a warrior. I am very sad."
Dominici won the French title five times during a long, successful club career with capital club Stade, where he was employed as a coach after retiring.
Had the privilege of playing against the @FranceRugby legend Christophe Dominici on many occasions. Such sad news to hear of his passing! 😔 Thoughts and prayers with his family and friends. RIP 🙏🏽😢 pic.twitter.com/3heMfhkwtk— Jason Robinson OBE (@Jason15Robinson) November 24, 2020
Former France scrum-half Dimitri Yachvili wrote: "I'm sad. My heart bleeds. You will forever remain an artist, an endearing and elusive man, a legend of our sport. A thought for your family and loved ones. Rest in peace Domi."
Ex-England star Jonny Wilkinson also offered his condolences.
"The death of Christophe Dominici is terribly sad. We think of all his relatives. The world of sport has lost a true legend," the World Cup winner posted on Twitter.
Wilkinson's former England team-mate Jason Robinson said: "Had the privilege of playing against the France rugby legend Christophe Dominici on many occasions. Such sad news to hear of his passing. Thoughts and prayers with his family and friends. RIP."
The epitome of french flair. RIP Dominici pic.twitter.com/xely27iUZo— Dan Carter (@DanCarter) November 24, 2020
Very sad to hear of the sudden passing of Christophe Dominici. A French player full of flair with huge success throughout his career. May he RIP.— Brian O'Driscoll (@BrianODriscoll) November 24, 2020
Small in stature but a titan on the field, Christophe Dominici we will never forget you.— All Blacks (@AllBlacks) November 24, 2020
Rest In Peace dear friend. 🖤🇫🇷 https://t.co/Ix7orU1jDi